$1$ ne following multiple regression mogei was aevelopea to predict jod perormance as measured by a company job performance evaluation index based on a preemployment test score and college grade point average $($GPA$)$:Y$=31+15$X$1+5002.$where y$=$ job performance evaluation index,Xi$=$ preemployment test score.$*2=$ college GPA.a$)$ For an applicant who had a $3\mathrm{.}2$ GPA and scored $80$ on the preemployment test, the forecast for the job performance Index $=($round your response to onedecimal place$).$b$)$ For an applicant who had a $2\mathrm{.}7$ GPA and scored $75$ on the preemployment test, theforecast for the inh nerformance index $=$ l mund vour response to one