1) Charles owns a home with solar panels on the roof. His utility company has a "buy-back" program that charges homeowners for the net energy used each quarter. He listed the quarterly charges and buy-back dollars for the 2 years he has been in the program (a) Use Descartes' rule to determine the maximum number of possible values (b) Use Norstrom's criterion to determine if there is only one positive value. Quarter Charges, $ Buy-back, $ 1 50 -200 -100 2. 100 3 -100 250 4 260 5 -100 -100 -150 200 6 170 7 -120 150 8 - 150 20