by using the capital preservation approach, calculate the capital needed at retirement for willianes, to replace 70% of michales the salary

Based on the text: He earns $170,000 per year. He is expecting no social security, and would like to have a standard of living at 70% of his preretirement income. He is currently 35 and wants to retire at 67, and expects to live to 92, meaning retirement will last 25 years. He is expecting a 9% rate of return, with inflation at 3%.