Return last n array elements

// Write a function that takes an array (a) and a number (n) as arguments
// It should return the last n elements of a
function
myFunction
(
a, n
)
{

return
}
Test Cases:
myFunction([1, 2, 3, 4, 5], 2)
Expected
[ 4, 5 ]
myFunction([1, 2, 3], 6)
Expected
[ 1, 2, 3 ]
myFunction([1, 2, 3, 4, 5, 6, 7, 8], 3)
Expected
[ 6, 7, 8 ]