I need to make a method that will check if these two fields: <div class="row">
        <div class="col-sm-6">
          <mat-form-field class="" appearance="outline">
            <mat-label>Beginning Date</mat-label>
            <input matInput
                   [matDatepicker]="beginningDatePicker"
                   required
                   id="formBeginningDateInput"
                   [(ngModel)]="beginDate"
                   name="beginningDate"
                   #beginningDate="ngModel"
                   [min]="minBeginDate"
                   (dateChange)="onBeginDateChange()">
            <mat-datepicker-toggle matSuffix [for]="beginningDatePicker"></mat-datepicker-toggle>
            <mat-datepicker #beginningDatePicker></mat-datepicker>
          </mat-form-field>
          <mat-form-field class="" appearance="outline">
            <mat-label>Beginning Time</mat-label>
            <input matInput type="time" required [(ngModel)]="beginTime" name="beginningTime" #beginningTime="ngModel">
          </mat-form-field>
        </div>                      and       <div class="form-field-container">
          <mat-form-field appearance="outline">
            <mat-label>Event Location</mat-label>
            <input type="text"
                   matInput
                   id="formHostInput"
                   name="eventHost"
                   [(ngModel)]="event.eventAddress"
                   #eventHost="ngModel"
                   required>
            <mat-error *ngIf="eventHost.invalid && (even Write your response with exactly 2 paragraphs, separated with the markdown divider: ***.
user