A cell phone carrier charges a fixed monthly fee plus a constant rate for each minute used. Part 1. In January, the total cost for 150 minutes was $ 62 while in February, the total cost for 175 minutes was $ 64 . The constant charge for each minute used is:

a. 0.09

b. 0.1

c. 0.08

Part 2. The fixed montly fee charged by the carrier is;

fee = $__________________