Q$20)$ Assume that you will receive the below cash flows at a yearly basis as shown on the timetable. What is the present value of the below cash stream if the appropriate annual interest rate for the related time span is as provided on the below timetable?

$($$$1,135\mathrm{.}65)$

$r=5\%$

$7\%$

$6\%$

a$)$