: An analyst has modeled the stock of Crisp Trucking using a two$-$factor APT model. The risk$-$free rate is $6\%,$ the expected return on the first factor $($r$1)$ is $12\%,$ and the expected return on the second factor $($r$2)$ is $8\%.$ If bi$150\mathrm{.}7$ and bi$250\mathrm{.}9,$ what is Crisp$$s required return?