$($b$)$ Given the expected net revenues and depreciation values on an investment tabulated below, construct the A TCF and calculate its PW considering a capital of $$40,000,$ tax rate of $20\%,$ and MARR of $10\%(6$ marks$).$

$\backslash$table$[[$Year$,1,2,3,4,5],[$Net revenue,$$10,000,$$$15,000,$$$25,000,$$$30,000,$$$40,000$