Implement the Function Methods in Haskell

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Consider:

data Fraction = Frac Integer Integer deriving Eq

Implement the methods below:

--1) constructor that takes two integers, n and m, and constructs a fraction representing n/m, which satisfies the invariant

frac :: Integer -> Integer -> Maybe Fraction

frac = undefined

--2) Show instance that outputs Frac n m as "n/m"

--3) Ord instance for Fraction

--4) Num instance for Fraction