s. Which of the following expressions represents the present value of continuous revenue stream for n years at a constant rate of $ S per year if the discount is r%? (A) 100S/r [i-c -rn/100] (B)r/100S -rn/100,] (c)rSc-m/10/100 (D) 100Scm 100/ (E) I )r/100S Ic-rn/100.,] 20. One unit of T1 uses 0.2 units of T1 and 0.6 units of T2. One unit of T2 uses 0.4 units of T1 and 0.2 units of T2 Find the associated Leontief inverse. (A)[1 2] 13 11 (B [1 3] 12 1.5] O[1 3] 12 1 (D)[2 1.5] [1 2] (B [2 1]