$7-9$ An interior point search using scaling has

reached current solution $x^{(7)}=(2,5,1,9).$

Compute the affine scaled $y$ that would correspond

to each of the following $x\text{'}$s$.$

$($a$)(1,1,1,1)$

$($b$)(2,1,4,3)$

$($c$)(3,5,1,6)$

$($d$)(3,5,1,7)$