i need to answer the grey cells based on information for option A and B

Option B 12,916.67 Option A Amount of Payment 12,916.67 Total Interest Paid 26,040 Effective Interest Rate 78,120 Unpaid Blance Option B Option A 500,000 400,000 300,000 200,000 100,000 0 0 1 2 3 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Which option is better and why? Write your comment here ... For the better option, how much will be the unpaid balance after 18 payments? Write your comment here ... Option B 12,916.67 Option A Amount of Payment 12,916.67 Total Interest Paid 26,040 Effective Interest Rate 78,120 Unpaid Blance Option B Option A 500,000 400,000 300,000 200,000 100,000 0 0 1 2 3 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Which option is better and why? Write your comment here ... For the better option, how much will be the unpaid balance after 18 payments? Write your comment here