Please explain the answers and show supporting calculations

Using information available at financc.yahoo.com, obtain Beta estimates for two companies: Toll Brothers, Inc. (Symbol = TOL) and Wal-Mart (Symbol = WMT). A. What is the Beta estimate for each company? B. Based upon this Beta estimate, which stock price do you think will increase by a greater % in response to unexpected, favorable, macroeconomic news? Which stock price will decrease by the greater percent in response to unexpected, negative, macroeconomic news? C. Based upon the descriptions of the two companies contained in the financc.yahoo.com "Profile(s)," why do the Betas in Part A and your answers in Pan B make sense from an economic perspective