Please show your works and answer in Finance way (not in excel) and highlight the answer. thank you

8. (Corporate application) You own a gold mine that is running dry. It will generate $2 mil in cash over the next year. After that, the depletion of gold will lead to a decline in cash flow of 4% per year. If the discount rate is 10% what is the value of the mine if: a) the mine never runs completely dry, and b) the mine runs dry after 20 years? Note: C = 2, g = -0.04, r = 0.10. a) GP b) GA with N = 20 6. How much do you need to put into your retirement account each year if you plan to retire in 30 years, and if you will need $2 million? (assume will earn a 12% rate of return) C C C C 0r = 12% 1 2 3 30 FV = $2mil