i need you to answer with haskell code.

Read the book until section 2.2 Exercise 1. Suppose we have the following in a script. Perform equational reasoning by hand execution for the function "g". Use a = 1, b = 2 and then check with the computer: f:Double-> Double -> Bool fab= if a > b then True else False g:Double-> Double-> Double gabiffa b then sqrt a-b else sartb-a (Hint: If you are not careful with precedence rules in mathematical expressions, your hand execution will not match the computer's answer)