How was pre-image wxyz transfmed to create image w'x'y'z'

a: 180° clockwise rotation around point b

b: 90° clockwise rotation around point b

c: reflection over line a

d: translation up

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance