Don't need answers, just need formulas on how to do it on excel.

4. (14 points) The dataset provides stock prices of Being, Amazon, and S&P 500 (a proxy for market portfolio, M) for 1/1/2015-1/1/2018. Estimate the betas of Boeing and Amazon. You can use any approach (e.g., graph, formula, relevant excel function, etc.). Hint: compute continuously compounded returns first and then use the returns to compute the beta.