Problem :

Write a function max3 of type int*int*int -> int that returns the largest of three integers.

Problem :

Write a function second of type a list -> a that returns the second element of a list. Your function need not behave well on lists with less than two elements.

Problem :

Write a function permute of type a list -> a list whose output list is the same as the input list, but with the first two elements of the list swapped. For example: permute ([1,2,3,4]) should return [2,1,3,4] or permute([a,b,c]) should return [b,a,c]

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