Calculate the mean and standard deviation of the portfolio. The proportions invested in each stock are shown in parentheses. a. Bank of Nova Scotia (BNS): 25%, Sun Energy (SU): 25%, Telus (T): 25%, George Weston (WN): 25% b. BNS: 10%, SU: 10%, T: 70%, WN: 10% c. BNS: 10%, SU: 50%, T: 10%, WN: 30% d. Which portfolio would a gambler choose? Explain. e. Which portfolio would a risk-averse investor choose? Explain.