Alocal bank in town offers two types of savings plan with different interest rates to customers. plan a offers an annual interest rate of 0.25% (0.0025) of the amount deposited. plan b offers an annual interest of 0.2% of the amount deposited in the current year and 0.1% of the amount deposited two years back. plan b will give 0.3% only for the first year of deposit. excel based on a retirement research article stated in a magazine, a minimum sum of $1 000 000 is required for one to retire comfortably. after reading the article, ah seng decides to deposit his $100 000 into the bank this year. which plan should ah seng choose so that he is able to hit the $1 000 000 as quickly as possible without taking out his deposit at any point in time?