Please show working and formula step by step. Much appreciate if you could help c) too.

(b) The following information is available for another investment alternative: Stock Expected Beta Standard Deviation Return Premium 9.8% 0.7012 11.7% Lithium 5.5% 0.2404 3.4% Market Portfolio 13.5% 1.0000 15.53% Current T-Bill rate is 2.5%. (i) Calculate the covariance and correlation coefficient between the return of Stock Premium and Stock Lithium (4 marks) (1) Calculate the expected retum and the standard deviation of Portfolio X with 60% investment in Stock Premium and 40% investment in Stock Lithium. (4 marks) Supposed that you are to construct Portfolio Y with the following proportions: Portfolio X (in Part ii) T-Bills 0.8 0.2 Compute the expected retum, standard deviation, beta, and non-systematic standard deviation of Portfolio Y. (10 marks) Determine THREE (3) assumptions of Capital Asset Pricing Model (CAPM) (marks (b) The following information is available for another investment alternative: Stock Expected Beta Standard Deviation Return Premium 9.8% 0.7012 11.7% Lithium 5.5% 0.2404 3.4% Market Portfolio 13.5% 1.0000 15.53% Current T-Bill rate is 2.5%. (i) Calculate the covariance and correlation coefficient between the return of Stock Premium and Stock Lithium (4 marks) (1) Calculate the expected retum and the standard deviation of Portfolio X with 60% investment in Stock Premium and 40% investment in Stock Lithium. (4 marks) Supposed that you are to construct Portfolio Y with the following proportions: Portfolio X (in Part ii) T-Bills 0.8 0.2 Compute the expected retum, standard deviation, beta, and non-systematic standard deviation of Portfolio Y. (10 marks) Determine THREE (3) assumptions of Capital Asset Pricing Model (CAPM) (marks