I need help with my homework which is due tonight by 7pm. I need detailed explainations and formulas please.

Assets Year 2015 2016 2017 2018 2019 2020 2021 Stock A 10% 13% 15% 14% 16% 14% 12% Stock B 10% 11% 8% 12% 10% 15% 15% Portfolios AB (50% A + 50% B) 10.00% Stock C 12% 14% 10% 11% 9% 9% 10% Statistics: a. b. e. f. Expected Value AVERAGE(C9:C15) Standard Deviation STDEVA(C9:C15) c. d. Spreadsheet Exercise 3 Portfolios AC BC (50% A + 50% C) (50% B + 50% C) 11.00% 11.00%