$3.$ A potential customer approaches you to advise him on his investment for retirement. He plans to open a unit trust account with RM$50,000$ using an auto$-$debit of RM$1,000$ per month. The unit trust account is expected to earn a dividend of $5\%$ annually. In this case:

a$)$ How much money he could accumulate if he starts his investment at $25-$years old and plans to retire at $55-$years$-$old?

$(6$ marks$)$

b$)$ How long he could use his money after retirement if he withdraws RM$2,000$ per month after retires.

$(4$ marks$)$

c$)$ Provide $2($TWO$)$ suggestions on other financial products $($or investments$)$ that would benefits his retirement life in the future