Show me the steps to solve

Problem $5($Normal Order of Evaluation$).$ For each of the following, identify the redex that should be

reduced first according to normal order evaluation and give the resulting expression after one beta

reduction.

a$.(!$x$.$ x $(!$z$.!$y$.$ x $)$ x y $)$

b$.(!$x$.$ x $!$x$.!$y$.$ x x $)((!$x$.$ y $)$ x $)((!$x$.$ y $)$ x $)$

c$.!$x$.((!$x$.$ y $)$ x $)((!$x$.$ y $)$ x $)(!$x$.$ y z $)$

d$.(!$x$.(!$x$.$ x $)$ x $(!$x$.$ x $)$ x $)(!$x$.$ y$)$ x