fix private questions

src/app/authorlist/authorlist.component.ts

@@ -23,7 +23,7 @@ export class AuthorlistComponent implements OnChanges {
     return Math.floor((itemsCount - 1) / itemsPerPage) + 1;
   }
 
-  private setPage(pageNumber: number) {
+  setPage(pageNumber: number) {
     this.currentPage = pageNumber;
     this.displayedAuthors = 
       this.authors.slice((pageNumber-1)*this.ITEM_PER_PAGE, pageNumber*this.ITEM_PER_PAGE);

src/app/booklist/booklist.component.ts

@@ -23,7 +23,7 @@ export class BooklistComponent implements OnChanges {
     return Math.floor((itemsCount - 1) / itemsPerPage) + 1;
   }
 
-  private setPage(pageNumber: number) {
+  setPage(pageNumber: number) {
     this.currentPage = pageNumber;
     this.displayedBooks = 
       this.books.slice((pageNumber-1)*this.ITEM_PER_PAGE, pageNumber*this.ITEM_PER_PAGE);

src/app/status-bar/status-bar.component.ts

@@ -15,7 +15,7 @@ export class StatusBarComponent implements DoCheck {
   isAdmin: boolean;
 
   constructor(
-    private router: Router,
+    router: Router,
     private authenticationService: AuthenticationService
   ) { }