$5$ points$).$ Rewrite the following s$-$expressions using the list notation of LISP$/$Scheme; if it cannot be

done for a particular s$-$expression, explain why not; if it can done partially, do so as much as possible:

a$.(4.$ NIL$)$

b$.((3.$ NIL$).(4.$ NIL$))$

c$.(3.((4.$ NIL$).(5.$ NIL$)))$

d$.(3.(4.5))$