xamarin forms 2 picker control

Hello developers
i create one page this page have two pickers, pickers have some items ( for each one 5 items)
so what i want to do when the user selected item from picker1 for example selected item number 3.
when the user want to select items from picker2, picker2 will display items number > 3 (user will allow to select item number 4 and 5 only) .
hope this clear for you

This my XAML

<Picker.ItemsSource>

12:15
12:55
1:35
2:15
2:55

</Picker.ItemsSource>


<Picker.ItemsSource>

12:15
12:55
1:35
2:15
2:55

</Picker.ItemsSource>

and i have no idea what should use in cs code.