Three years ago you founded your own company. You invested $100000 of your own

Three years ago you founded your own company. You invested $100000 of your own money and received 5 million shares of Series A preferred stock. Your company has since been through three additional rounds of financing. Round Price ($) Number of Shares Series B 0.50 1000000 Series C 2.00 500000 Series D 4.00 500000 a. What is the pre-money valuation for the Series D funding round? b. What is the post-money valuation for the Series D funding round?