Exercise 5 (10 Points) Answer each question. Show supporting computations and explain your answer. A. In 2019, Erin purchased a solar heating system for her swimming pool at a cost of $3,500, how much could she claim as a tax credit? B. If she had purchased a $5,000 solar electric system for her principal home and a $4,500 solar heating system for a second residence (not for the swimming pool), how much could she claim as a tax credit