A utility company charges $0.14 per kilowatt-hour for energy a customer uses. They give a credit of $0.035 for every kilowatt-hour of electricity a customer with a solar panel generates that they don't use themselves. A customer has a charge of $95.14 and a credit of $6.02 on this month's bill.

a) What is the amount due this month?

b) How many kilowatt-hours did they use?

c) How many kilowatt-hours did they generate that they didn't use themselves?