Could you please solve problem 3? Thank you

Life of lu years Eife of 4 years 0.2 3. A containment system for low level nuclear waste involves a geotextile liner. designs. Decide which is the best design life is 40 years. The rate is 3% per year. There are four alternative alternative (ie., alternative that minimizes overall aual cost) The !Cleaningcostifthere s aleaks spill probability Liner type Alt A Alt B Alt C AILD Cost $ 200,000 350,000 600,000 2,000:0000 1,500:000 300,000 200000 1/20 1/40 1/100 1300 9500001 . 4. Determine the probability that the following tree reflecting a stock investment has a rate of return higher than 7% per year. There are equal chances (50150) keeping their htock 3 years versus 5 years. 120 3 40 d4 2