After saving $1 million, Mike has decided to retire now. He wont have any other sources of income (e.g., Social Security) during retirement. He estimates he can earn an annual return of 4% after retirement. Also, he needs to withdraw $50,000 in the beginning of each retirement year to cover the expenses throughout a year. His philosophy is when running out of money, he dies. How many years can he live (Note: fractional year allowed)? Show the time line and key steps of one method.