Could you please answer both questions?

1. Use the hand solution (no Excel this time!) to determine the interest rate per period from the following equation: 5 points) 0 = 40,000 + 3,000(P/A, 1*, 5) -8.000(P/F, 1*, 3) 2. Multiple i* values may exist when there is more than one sign change in the net cash flow series. Please list the two tests you can perform to see if multiple is values exist and define each one. (5 points) 1. Use the hand solution (no Excel this time!) to determine the interest rate per period from the following equation: 5 points) 0 = 40,000 + 3,000(P/A, 1*, 5) -8.000(P/F, 1*, 3) 2. Multiple i* values may exist when there is more than one sign change in the net cash flow series. Please list the two tests you can perform to see if multiple is values exist and define each one. (5 points)