$7.$ Consider the following definition in a HASKELL$-$like programming language

$```$

start x $=$ one

where param $=$ x

two s $=$ let x $=1$ in s

one $=$ let x $=2$ in $($two param$)$

$```$

$($a$)[5]$ What would be the result of the call start $20$ if the language uses deep binding? Explain.

$($b$)[5]$ What would be the result of the call start $20$ if the language uses shallow binding? Explain.