Open the quiz-edit.component.html template file and implement the ResultListComponent as a sub-component in the following way, right after the <question-list> element (new line highlighted):

[...]

    <question-list *ngIf="editMode" [quiz]="quiz"></question-list>

    <result-list *ngIf="editMode" [quiz]="quiz"></result-list>

[...]

Right after that, open the app.module.shared.ts file and add the usual import references, declarations, and routes:

[...]

import { AnswerEditComponent } from './components/answer/answer-edit.component';
import { ResultListComponent } from './components/result/result-list.component';
import { ResultEditComponent } from './components/result/result-edit.component';
import { AboutComponent } from './components/about/about.component';

[...]

    declarations: [

[...]

        AnswerEditComponent,
        ResultListComponent,
        ResultEditComponent,
        AboutComponent,

[...]

        RouterModule.forRoot([

[...]

            { path: 'answer/edit/:id', component: AnswerEditComponent 
                                                                   },
            { path: 'result/create/:id', component: ResultEditComponent 
                                                                   },
            { path: 'result/edit/:id', component: ResultEditComponent 
                                                                   },
            { path: 'about', component: AboutComponent },

[...]

As we can see, we also took the chance to add the references and routes for the upcoming ResultEditComponent, which is coming in the next paragraph.