Finance problem questions attached below. I would also like to upload an Excel sheet if there is a way to send attach, please let me know. Thanks

Q1 Prices approximate) One share of Berkshire Hathaway common stock had a market price of about $250 per share at the end of 1968. Assume a market price of about $350,000 at the end of 2018, a time span of 50 years. Assuming no dividends, what was the annual rate of return for an investor who bought at the end of 1968 and sold at the end of 2018?

Q2 Devise a numerical example that demonstrates why trading desks in banks, prior to Dodd-Frank, were so profitable.