6. The current pricing schedule per kilowatt hour (KWH) for SCE (Southern California Edison) is below: First 17 KWH per day 9 cents/KWH Additional KWH per day 7 cents/KWH Fixed Delivery Charge of 10 cents per day Ariana's daily demand for electricity in the summer is Q = 69 - 6P. Q is in KWH/day and P is in cents, e.g., P = 2 is $0.02. a. What is Ariana's total KWH consumed on a summer day? b. What is Ariana's consumer surplus at this quantity of KWH