Show me the steps to solve Portfolio $P$ is composed of $70\%$ Stock A and $30\%$ Stock $B.$

Required:

a$.$ What is the standard deviation of portfolio $Q?$

Note: Calculate using numbers in decimal form, not percentages. For example use $"20"$ for calculation if standard deviation is provided as $20\%.$ Do not round intermediate calculations. Round your answer to $2$ decimal places.

b$.$ What is the beta of portfolio Q $?$ Note: Calculate using numbers in decimal form, not percentages. For example use $"20"$ for calculation if standard deviation is

provided as $20\%.$ Do not round intermediate calculations. Round your answer to $2$ decimal places.

c$.$ What is the "firm$-$specific" risk of portfolio Q$?$

Note: Calculate using numbers in decimal form, not percentages. For example use $"20"$ for calculation if standard deviation is provided as $20\%.$ Do not round intermediate calculations. Round your answer to $4$ decimal places.

d$.$ What is the covariance between the portfolio and the market index? Note: Calculate using numbers in decimal form, not percentages. For example use $"20"$ for calculation if standard deviation is provided as $20\%.$ Do not round intermediate calculations. Round your answer to $2$ decimal places.