Type error. If cat is supposed to be the list concatenation
function, then it takes two lists as parameters, not two integers
and two lists.
Incorrect. Even if we assume that the cat call makes
sense, and it puts together the listed things, this equation
says merge([2,4,6], [3,5,7]) = [2,3,4,6,5,7]. That is not correct.
It also says that merge([1,2,3,4], [5,6,7,8]) = [1,5,2,3,4,6,7,8].