added answers

11_getTheTitles/getTheTitles.js

@@ -1,6 +1,7 @@
-const getTheTitles = function() {
-
-};
+function getTheTitles(book){
+    const result = book.map(getTitle => getTitle.title);
+    return result;
+} 
 
 // Do not edit below this line
 module.exports = getTheTitles;