Part 1 ) LED3 blinks at 120ms

State diagram for LED3

Part 2) LED4 blinks at the rate of 1s when button is not pressed/released LED4 will blink at the rate of 100ms when button is pressed

State diagram for LED4

Part 3) LED5 will blink 5 times at the rate of 200ms when button is pressed and will reset if button is released

State diagram for LED5