i have question of (c) and (d), especially (c)

Jane Ericsson has just purchased a 62 square meter down-town flat at NOK 3,500,000 financed with 20% of her own capital. Financing the rest of the purchase, a 20-year NOK 2,800,000 ordinary annuity mortgage at 3.15% per year specifies end-of-month payments of interest including principal over the amor- tization period. The first payment is due one month from today. A two percent initiation fee charged by the lender requires Jane to increase her equity contribution by NOK 56,000. It is commonly expected that down-town flats in Jane's neighborhood will appreciate by 2 percent per year over the next ten years. Please provide numerical answers to the questions below: (a) (7 points) Which monthly payment will amortize the mortgage loan over the 20-year term? (b) (7 points) What effective yield is Jane paying on the mortgage over the 20-year term? Assume that Jane wants a 50% equity-share in her flat after exactly 10 years (ie. 120 monthly payments). Towards that end, she has received the lender's approval to adjust her monthly payment of interest and principal. (c) (d) (8 points) Which monthly payment accomodates a 50% ownership in the flat after 10 years? pmt= 12 084,31 (8 points) Given the monthly payment calculated in (c), how many years does it take until the loan is fully amortized (paid-down)? N=357,45 aproximates to 29,79> 30 years Jane Ericsson has just purchased a 62 square meter down-town flat at NOK 3,500,000 financed with 20% of her own capital. Financing the rest of the purchase, a 20-year NOK 2,800,000 ordinary annuity mortgage at 3.15% per year specifies end-of-month payments of interest including principal over the amor- tization period. The first payment is due one month from today. A two percent initiation fee charged by the lender requires Jane to increase her equity contribution by NOK 56,000. It is commonly expected that down-town flats in Jane's neighborhood will appreciate by 2 percent per year over the next ten years. Please provide numerical answers to the questions below: (a) (7 points) Which monthly payment will amortize the mortgage loan over the 20-year term? (b) (7 points) What effective yield is Jane paying on the mortgage over the 20-year term? Assume that Jane wants a 50% equity-share in her flat after exactly 10 years (ie. 120 monthly payments). Towards that end, she has received the lender's approval to adjust her monthly payment of interest and principal. (c) (d) (8 points) Which monthly payment accomodates a 50% ownership in the flat after 10 years? pmt= 12 084,31 (8 points) Given the monthly payment calculated in (c), how many years does it take until the loan is fully amortized (paid-down)? N=357,45 aproximates to 29,79> 30 years