Assume that you invest $20,000 at age 20 and your portfolio's annual return is 15% per year. Despite the fact that you dont invest anything else after 20, at what age do you become a $ millionaire? (Assume no inflation ) (SOLVE IN SCILAB)

a) Write the mathematical model.

b) Write down the code to compute and determine the millionaire age.

c) Plot the graph in scilab (networth vs. age) d

) Explain how this is possible although you only invested $20k.