Answer:
to get from the first floor to the 72nd, the person need to click 14 times the first button to get the floor 99nd and then click 3 times the second button to get the floor 72nd
Step-by-step explanation:
if the person is on the first floor and he click the first button 14 times, he will be on the floor 99nd because, 1+(14*7) = 99, and if he click the second button 3 times then will be on the 72nd floor because, 99-(3*9) = 99-27 = 72
