The Treasury bill rate is $4\%,$ and the expected return on the market portfolio is $12\%.$ According to the capital asset pricing model:

a$.$ What is the risk premium on the market?

b$.$ What is the required return on an investment with a beta of $1\mathrm{.}5?($Do not round intermediate calculations. Enter your answer as a whole percent.$)$

c$.$ If an investment with a beta of $8$ offers an expected return of $9\mathrm{.}8\%,$ does it have a positive or negative NPV$?$

d$.$ If the market expects a return of $11\mathrm{.}2\%$ from stock $x,$ what is its beta? $($Do not round intermediate calculations. Round your answer to $1$ decimal place.$)$

Answer is not complete.

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