I really just need help with parts b and c.

2) ABC Company is evaluating two capital investment proposals, each requiring an investment of $200,000 and each with an 8-year life and expected total net cash flows of $400,000. Option 1 is expected to provide equal net cash flows of $50,000, and option 2 is expected to have the following unequal annual net cash flows: (10 points) Year 1 $110,000 Year 2 $90,000 Year 3 $60,000 Year 4 $40,000 Year 5 $30,000 Year 6 $30,000 Year 7 $20,000 Year 8 $20,000 Instructions: a) Calculate the cash payback period for both options b) Based on the cash payback period method, which option is best? c) What are the advantages and disadvantages of the cash payback period method