Download daily price data for January 1, 1980 through December 31, 2019 of Boeing stock from Yahoo Finance. You may use the quantmod package in R for this purpose.

using the daily price data of Boeing stock to calculate the monthly log return. there any evidence of ARCH effects in the monthly log returns? Use the residual series if there are serial correlations in part (ii). Use Ljung-Box statistics for the squared returns (or residuals) with 6 and 12 lags of autocorrelations and 5% significance level to answer the question.

(R)