Swift Generics vs Any

I read swift documentation in apple site. There is a function swapTwoValues, which swaps two any given values

func swapTwoValues1<T>(_ a: inout T, _ b: inout T) {
    let temporaryA = a
    a = b
    b = temporaryA
}

Now I want to write similar function but instead of using T generic type I want to use Any

func swapTwoValues2(_ a: inout Any, _ b: inout Any) {
    let temporaryA = a
    a = b
    b = temporaryA
}

to call this functions I write

var a = 5
var b = 9


swapTwoValues1(&a, &b)

swapTwoValues2(&a, &b)

I have two questions.

1) Why the compiler gives this error for second function (Cannot pass immutable value as inout argument: implicit conversion from 'Int' to 'Any' requires a temporary)

2) What is the difference between Generic types and Any