Your current salary is $100,000 per year. Every year you put 8 percent of your salary into a retirement account which pays a guaranteed return of 7 percent per year. How much will you have at retirement (end of 30 years), if:

a) No growth in your salary.

b) A growth rate of 5 percent per year in your salary.

c) How much could you withdraw each month for 20 years following retirement (assume the return of 7 percent per year continues to hold)