please answer parts a and b

You hear on the news that the S&P/TSX Composite Index was down 2.2% today (the market's return was - 2.2%). You are thinking about your portfolio and your investments in BlackBerry and WestJet. a. If BlackBerry's beta is 1.2, what is your best guess as to BlackBerry's return today? b. If WestJet's beta is 0.5, what is your best guess as to WestJet's return today? a. If BlackBerry's beta is 1.2, what is your best guess as to BlackBerry's return today? BlackBerry's return today is %. (Round to one decimal place.)