A$.$ laulai is saving for his retirement. He invested. He invests a regular $$1000$ per month for $20$ Years and earns $8\%$ p$.$a$.$ How much does he have on his retirement $?$

B$.$ Laulau says he will live for $18$years after he retires. He intends to spend all of his nest eggs through monthly payments from his pension fund. He budgets on the fund earning $5\%$p$.$a$.$How much can he draw each month?