please solve these two problems without using excel and show all steps.

4 A 40-year loan is repaid by level annual payments at the end of each year. The principal paid in the 20th payment is 162.43 and the principal paid in the 25th payment is 238.66. Find the amount that was borrowed. A) 9.500 B) 9,750 C) 10,000 D) 10,250 E) 10,500 5 Dinah Soares borrows money to buy a new piano. She agrees to pay back the loan with level annual payments at the end of each year for 30 years. The annual effective interest rate is 7%. The amount of interest in her 10th payment is 366.74. What is the amount of interest in her 20th payment? A) 221.86 B) 229.64 C) 244.18 D) 250.72 E) 253.80