Please show how to solve in simplest way with work, if needed excel is acceptable:

A publicly traded firm had the following stock price series.... Jan $61.22 Feb $56.69 Mar $57.87 Apr $62.80 May $64.22 Jun $63.98 Calculate the historical average return for the stock. a.) -1.36% b.) 2.148% c.) 1.88% d.) 0.74% e.) 1.02%