Haskell Programming

-- 4. The exclusive-or function, xor :: Bool -> Bool -> Bool, takes two Bool values and returns

-- True when precisely one is True, returning False otherwise. Define three versions of this

-- function using:

-- (a) pattern matching

-- (b) if then else

-- (c) the operator /= (not equal to)

--

-- Name your functions xor1, xor2 and xor3. Make your definitions as simple as possible.