Also need helping calculating the Rate of Return for both projects!

PROJECT A B Initial investment (CFO) $120,000 $78,000 Cash flows returns in year (t): 1 $22,000 $41,000 2 $36,000 $33,000 3 $44,000 $31,000 4 $51,000 $12,000 5 $57,000 $4,000 In which of the two projects would you prefer to invest? Assume they have identical business risk