Question 4 (a) Mr Keegan is aware of the high cost of retirement in Singapore and plans to save more as his income grows in future. He plans to make annual deposits into a bank account that pays interest at 4% per annum. His first deposit at the end of Year 1 is $1,500. The amount deposited will increase by $300 for each of the next 4 years. Calculate the amount that Mr Keegan will have in his bank account at the end of the 5th year? (15 marks)