Q$3)$ For each of the following constraints of pure BIP problems, identify which ones are made

redundant by the binary constraints. Provide explanation for each one.

$($a$)2x_1+x_2+2x_{3}5$

$($b$)3x_1-4x_2+5x_{3}5$

$($c$)x_1+x_2+x_{3}2$

$($d$)3x_1-x_2-2x_3-4$