QUESTION 1 01(a) Consider the following set of numbers 25, 20, 23, 42. 39. 6. 45 Apply Quick sort technique and write the steps to sort the above given numbers. (b) What is an expression tree ? Build an expression tree for the given infix expression 20. 9/32 + 1 191 [6] (c) Apply Heap sort technique to arrange the following numbers in sorted order. 11, 2, 9, 13, 57, 25 [10]