backend.ts errors

I am getting the following for all of the photos:

ERROR in ./src/app/backend.ts Module not found: Error: Can't resolve '../../photos/Burning-sundown-behind-trees.jpg' in '/Users/captainpj/Documents/workspace/angular-redesign/src/app' @ ./src/app/backend.ts 11:23-79 @ ./src/app/app.module.ts @ ./src/main.ts @ multi (webpack)-dev-server/client?http://localhost:8080 ./src/main.ts

With the next two errors loading after: ERROR in [at-loader] ./src/app/entries/shared/entry.service.ts:14:8 TS2339: Property 'toPromise' does not exist on type 'Observable<Response>'.

ERROR in [at-loader] ./src/app/entries/shared/entry.service.ts:15:13 TS7006: Parameter 'response' implicitly has an 'any' type.

I also get the following when I try to install angular-in-memory-web-api, which may or may not be related

├── angular-in-memory-web-api@0.2.4 ├── UNMET PEER DEPENDENCY rxjs@5.2.0 └── UNMET PEER DEPENDENCY zone.js@0.7.8

I've been working at this for a while. Any ideas? backend.ts was copied from the instructor files. My entry.service.ts looks like this:

import { Entry } from './entry.model'; import { Injectable } from '@angular/core'; import { Http } from '@angular/http';

@Injectable() export class EntryService {

constructor(private http: Http) {

}

getEntries(): Promise<Entry[]> {
    return this.http.get('/app/entries')
                    .toPromise()
                    .then(response => response.json().data as Entry[]);
}

}

Many thanks in advance!