Suppose Johns & Johns stock (INJ) is equally likely to have a 36.50% return, a 19.00% return, a 11.75% return or a -12.25% return. What is the standard deviation of its returns? If the correlation between Blackberry and Shopify is 0.65, the standard deviation of Blackberry returns is 19.00% and the standard deviation of Shopify returns is 23.25%, what is the covariance of the returns between Blackberry and Shopify