If T is the time in minutes that bob waits at a bus stop

T~U(0,5)

Excuse the poor paint diagram :P

He gets the bus once on monday and once on tuesday.

What is the probability he will wait for less than 4 minutes in total for both days? (both events are independent).

Ive been trying to do it for like 3 hours now, but im none the wiser, my lecteur notes dont have any examples on it.