Answer 1

array "A" that has elements
3 variables as x, y, z
2 counters as i, j "i=0 & j=i+1
loop that takes value of A[i] & put it in x, value of A[j] & put it in y, then use variable z in swaping & increment i by 1
repeat this to the last 2 elements of array
another array to save the swapped values with another 2 counters