11) Select the option that removes the Page2 page from the stack in an application of Xamarin.Forms /1pt a) Navigation.PopAsync(); b) Navigation.PopAsync(Page2); c) Navigation.PushAsync(); d) Navigation.PushAsync(Page 2); 12) Select the option that sets the Page3 page stacked in an application of Xamarin.Forms /1pt a) Navigation.PushAsync(Page 3); b) Navigation.PushAsync(Page 30); c) Navigation. PushAsync(new Page3()); d) Navigation.PopAsync(new Page3()); 13) Select the option that combines 2 cells in a row of Grid in an application of Xamarin.Forms /1pt a) ColumnSpan="2" b) Grid.RowSpan="2" c) Grid.ColumnSpan="2" d) RowSpan="2" 14) Write the missing code to split the contentPage (in Xamarin.Forms) into 2 columns and 3 rows. Take the same height of the rows and the same width of the columns. /3pt 15) Write the properties for LinearLayout1 according the drawing shown below/3pt