Carter & Co. is trying to decide which of two investments they should consider. The following information is available: Investment A Investment B Cost $400,000 $600,000 $40,000 $160,000 Salvage value Annual cash flow $0 $104,000 Each investment is expected to have a useful life of 5 years. (Rounded) (a) What is the rate of return on average investment of each investment? (b) What is the payback period of each investment