Return calculations

For each of the investments shown in the following table, calculate the rate of return earned over the unspecified time period.

Cash flowBeginning-of- End-of-

Investmentduring period period value period value

A -$ 800 $ 1,100 $ 100

B15,000 120,000118,000

C 7,000 45,000 48,000

D 80 600 500

E 1,50012,500 12,400

Please provide your OWN work. Thanks.