Answer:
$ 22.22
Step-by-step explanation:
Let
P = amount to save per week
B = expected accurate at 16 years = $5000
r = APR = 3.9% = 0.039
n = numbers of week in a year = 52weeks
t = 16 - 12 = 4 years terms of savings.
Using,
P = (B * r/n)/{(1 + (r/n))^(nt) -1}
P = (5000 * 0.039/52)/{(1 + (0.039/52))^(52 * 4) -1}
P = $22.22