1/7/2014 Jarnar Sanpe 6(a). For the diagram below, compute the RR to within 1%. ( 10 pts.) S125 si8 $20 $30 $40 $50 $60 For the diagram below, compute the interest rate at which the costs are equivalent to the benefits. 6(b). Costs are equivalent to the benefits. (10 pts.) 80 80 880 880 80 s80 1 2 3 4 $200 $200