Please help with the solution.

5.7 A solar cell has efficiency n = 30%. A. How much power can be produced on a clear day (Is = 1000 W/m-) using a cell array with area 100 m x 100 m? B. If the array produces 20 V, find the average current. 5.8 A 1 cm solar cell absorbs 10 W/m of 550 nm light. A. How many photons/s are absorbed? B. Assuming 20% efficiency, how many electron-hole pairs are produced? C. What is the resulting current? Each e-h pair carries electron charge e = 1.6 x 10-19 C