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 i* values. (b) Use Norstrom's criterion to determine if there is only one positive i* value. Quarter Charges, $ Buy-back, $ 1 -200 50 2 -100 100 3 -100 250 4 -100 260 5 -100 200 co -150 170 7 -120 150 8 -150 20