can you explain step by step how he got 61 , thank you !!

18) Assume that in a company there is debt with a face value of 70 curo that pays no coupons and matures at the end of the year. Shareholders, who have limited liability, must agree to choose between one of two projects and the required return on debt is 0%. The chosen project will generate the following rents one year later: Rents, one year later Project A (safe) 75 euro Project B (risky) 160 euro with probability 70% 40 euro with probability 30% What is the market value of debt? a) 61 euro b) 49 euro c) 70 euro d) None of the above