Please show formulas

Q12 At the end of each year, you plan to deposit into savings account following the schedule below Year Deposit Balace 100 1 2 200 3 300 4 100 5 200 6 300 If interest rate is 9.5% a year, find the balance at the end of each year in your account. For checking purpose, calculate the sum of the column balance and report it in Sakai. Q13 At the end of each year, you plan to deposit into savings account following the schedule below Year Deposit 1 100 2 200 3 300 4 100 5 200 6 300 What must be the interest rate so that the balance at the end of year 6 is 1,669.45 Q14 You borrow 300,000 to buy a new house. The loan is a conventional 30-year loans and payment is made at the end of each month (so will you make more than just 30 payments, right!) What should be the monthly interest rate so that payment is $2,948.01