How to remember to value a bond 7 years from today

CFA Level I FRA
#1

From Kaplan:
What is the present value of this bond and what will the bond’s value be in seven years from today if the yield is unchanged?

Explanation
Present Value:
Since the current interest rate is above the coupon rate the bond will be priced at a discount. FV = $5,000,000; N = 20; PMT = (0.04)(5 million) = $200,000; I/Y = 4.5; CPT → PV = -$4,674,802

Value in 7 Years:
Since the current interest rate is above the coupon rate the bond will be priced at a discount. FV = $5,000,000; N = 6; PMT = (0.04)(5 million) = $200,000; I/Y = 4.5; CPT → PV = -$4,871,053

I incorrectly used N = 7 to value the bond 7 years from today. This always trips me. What is an easy to remember phrase to remind myself to always discount one year before the asked for number of years?

#2

Does the question state that this is an annual coupon? If I assume annual compounding and payments (P/Y=C/Y=1), then I do get PV at issue of 4,674,802. However, if 7 years has passed, I would use N=13 for the second part (20 years total - 7 years elapsed =13 years to go): doing so gives a PV of $4,757,929. I have no idea why they are using N=6. :roll_eyes: