jane is 30 years old today and has no savings. she wants to retire at the age of 70, which is 40 years from today. with great challenge she has decided she will manage to save $2,400 end of every year for first 20 years (years 1 to 20) this payment will increase to $6,000 for the last 20 years (years 21 to 40) first payment will take plan one year from today and last payment will be end of year 40. you expect the interest rates to be 4% a year for the first 20 years (years 1 to 20) and increase to 6% a year for remaining years (years 21 to 40) how much money will be in your account at the end of 40 years

a. $877,532.89

b. $449,919.14

c. $607,678.22

d. $408,956.89

e. $644,457.37