Starting at n = 0, a person deposits $500 at the beginning of every month with the exception of month n = 4, when instead of depositing $500, she withdraws $1,000 (a withdrawal is just a negative...

Starting at n = 0, a person deposits $500 at the beginning of every month with the exception of month n = 4, when instead of depositing $500, she withdraws $1,000 (a withdrawal is just a negative deposit). Find y[n] if the interest rate is 1% per month. Because the deposit starts at n = 0, the initial condition y[−1] = 0.