Question $3$: $($Traffic lights$)$

Write a program that simulates a traffic light. The program lets the user select one of three lights: red, yellow, or green. When a radio button is selected, the light is turned on$.$ No light is on when the program starts.

Question $4$: $($Set clock time$)$

Write a program that displays a clock and sets the time with the input from three text fields, as shown in Figure $16\mathrm{.}38$b$.$ Resize the clock to the center of the pane.

$($b$)$