Solve with equations please.

Two reagents (permanganate and hydrogen peroxide) are being considered for injection into contaminated groundwater to clean up pesticides. Based on laboratory studies, increasing dosages of each oxidant have different probabilities of effectively destroying the pesticides. Using the data in the following table determine the expected present worth [E(PW)] for each project and select the least cost alternative. The MARR = 6% and n = 5 years. Annual chemical costs based on the probability of clean up to the regulatory standard [P(clean up)]