5. Brock and his friends want to go ice skating at the local ice rink. The rink charges by the hour. Brock also has to rent ice skates. Brock's total cost, C, of skating for h hours is given by the equation C-10.5 = 2.5(h-3). a. How much does it cost Brock to skate for 3 hours? b. How much does the ice rink charge per hour of skating? c. How much does the ice rink charge for renting skates?