Compute average over Average log-return Date 1/5/1988 1/6/1988 1/7/1988 1/8/1988 1/11/1988 1/12/1988 1/13/1988 1/14/1988 1/15/1988 1/18/1988...

Provide a tool where we will let the user compute the average log-return over the past X days, where X will be a user input.

So, you need to compute the log-return for the time series of prices given in the Excel Document. Then, you need to compute the average log-return of all (X) returns, where (X) is a user input.