please solve on paper.

A machine is purchased for a value of $20K. The revenues and costs associated with the operation of the machine for the next 18 years are as shown in the Figure below. The machine has a salvage value that amounts to 2.5% of the purchase value at the end of its useful life (not shown in the figure). If the MARR is given as 7.5%, what is the value of A that will make the internal rate of return (IRR) twice the MAAR value. $600 $550 $400 $300 3 15 10 11 12 13 14 15 16 18 um A $20 K