Answer:
a. 22.64%
Step-by-step explanation:
At first we are going to need to compute the Internal rate of return(IRR) (in which the current value of inflows = the current value of outflows)
Let's let the IRR be x percent
Therefore $4,500 = $750 / (1.0x)
+ $1,000 / (1.0x) power 2 + $850 / (1.0x) power 3
+ $6,250 / (1.0x) power 4
Thus, x = approximate return rate = 22.64 percent