Aplumber charges a flat fee of 77$ to visit a home and examine a clogged drain. the plumber charges an additional 24$ per hour spent fixing the drain. the total cost, c (in dollars), for fixing a drain that takes h hours is given by the following.

c=77+24h

answer the following questions.

(a) what is the total cost for fixing a drain that takes 7 hours?

(b) if the plumber charges a total of 365 $ how long did he take to fix the drain