refactor: organize exercises and questions for the 5th section

05-write-your-first-library-package/questions/questions.md

@@ -8,13 +8,9 @@
 
 > **1:** You can't, but you can import it from other packages.
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 > **2:** In a library package, you don't have to include a main function. Because, it isn't an executable package. Only in executable packages you need a main func.
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 > **4:** You don't have to compile it. When you import it, it will automatically be built by the other program or library when it gets compiled or ran.
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 ## What do you need to export a name?
@@ -25,16 +21,11 @@
 
 > **1:** When you do so, it will be exported, that's true, but don't do that; so I assume that this answer is not correct :)
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 > **2:** That's right. Then the other packages can access it.
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 > **3:** It should be in a package scope, not function scope.
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 > **4:** You don't have to do that.
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 ## How can you use a function from your library from an executable program?
@@ -45,16 +36,11 @@
 
 > **1:** You can't export packages. All packages are already exported. Unless you put them in a directory called: "internal". But, that's an advanced topic for now.
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 > **2:** That's right.
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 > **3:** You can't access to a package from another package without importing it.
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 > **4:** No, you can't. You need to import it using its full directory path after GOPATH. BTW, in the near future this may change with the Go modules support.
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 ## In the following program, which names are exported?
@@ -79,16 +65,11 @@ func Fireball() {
 
 > **1:** That's just an imported package name.
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 > **2:** It starts with a lowercase letter; so, it's not exported.
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 > **3:** That's right. It starts with a capital letter.
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 > **4:** This isn't your function. It's already been exported in the fmt package. But, it isn't exported here.
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 ## In the following program, which names are exported?
@@ -116,13 +97,8 @@ func Fireball() {
 
 > **1:** doMagic starts with a lowercase letter; so, it's not exported.
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 > **2:** That's right. Fireball and Two, they both start with a capital letter.
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 > **3:** greenTrees starts with a lowercase letter; so, it's not exported.
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-> **4:** one and greenTrees do not start with capital letters; so, they're not exported.
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+> **4:** one and greenTrees do not start with capital letters; so, they're not exported.