Given below are the returns of Google and Microsoft Corporation over the past 6 years: Year Ending Google Microsoft Corporation 31 March 2023 12% 31 March 2022 14% 31 March 2021 19% 31 March 2020 -11% 31 March 2019 7% 31 March 2018 -2% 6% 21% 18% 13% a) Calculate the expected return for Google and Microsoft Corporation. b) Calculate the variance for Google and Microsoft Corporation, [2] [3]