There are two unequal life time mutually exclusive alternative investments, A and B with following cash flow. Other opportunities exist at 12% minimum rate return.

	C=$150	I=$55	I=$50	I=$45	I=$40	I=$35	L=$150
A)
	0	1	2	3	4	5

	C=$100	I=$50	I=$45	I=$40	L=$100
B)
	0	1	2	3

C: Cost, I:Income, L:Salvage

Using ROR and NPV analysis, which investment is economically better? Please include the incremental analysis and show all your work.