Please provide the problem worked out in writing and indicate if it's an elimination or nucleophillic substitution reaction. Give the major organic product$($s$)$ of the reactions shown below. If no reaction is expected, write $"$N$.$R$."$ Clearly

show stereochemistry if appropriate.

$($a$)$

$($b$)$

KOH,EtOH

$($d$)$

$C{H}_{3}I$

heat