Nobody has been able to get these questions correct. please help me$!!$

Question $6$:

Next period a firm will be worth $$58$ with $15\%$ probability, $$90$ with $52\%$ probability, and $$155$ otherwise. The firm has one senior bond outstanding with a face value of $$34$ and one junior bond outstanding with a face value of $$38.$ The senior bond has a promised return of $4\%.$ The junior bond has a promised return of $12\%.$ The firm's required return on assets is $15\%.$ What is the expected return on the junior bond? Give your answer in percentage to the nearest $0\mathrm{.}1\%.$ correct answer: $5\mathrm{.}8$

Question $7$:

Next period a firm will be worth $$50$ with $11\%$ probability, $$83$ with $62\%$ probability, and $$160$ otherwise. The firm has one senior bond outstanding with a face value of $$34$ and one junior bond outstanding with a face value of $$34.$ The senior bond has a promised return of $2\%.$ The junior bond has a promised return of $15\%.$ The firm's required return on assets is $13\%.$ What is the value of the firm? Give your answer in dollars to the nearest $$0\mathrm{.}01.$ Correct answer: $88\mathrm{.}64$