Q4) a) For the cash flows shown, determine the incremental cash flow between machines B and A (a) in year O. (b) in year 3, and (c) in year 6. Machine First Cost, $ AOC. $ per year Salvage Value, $ Life, Years A -12.000 -1.900 3,000 3 B -25,000 -400 6,000 6 a) The incremental cash flow between machines B and A in year is $ b) The incremental cash flow between machines B and A in year 3 is $ c) The incremental cash flow between machines B and Ain year 6 is $ b) Use factors and a spreadsheet to determine the interest rate per period from the following equation: 0 = -26,000+8,000 (P/A,**,5) + 8,000 (P/F2*,8) The interest rate per period is %