Question $3$: $(40$ points$)$

Given an integer array, find k $\text{'}$th smallest element in the array where k is a positive integer less

than or equal to the length of array. Write code to solve this problem in arr$=[7,4,6,3,9,1]$

k$=3$

Example Output:

k$^(\text{'})\text{'}$th smallest array element is $4$