In an array based representation of a binary tree, what should be the maximum size of the array to accommodate the binary tree shown below? 3. 26 821 6 18 37 7 59 a. What is the maximum size of the array? (Write the formula also.) Maximum Size of array: 1 b. Draw the arrav with its index values and the items of the above binary tree inside that array. 2 c. Write the order of the items visited in the above binary tree in Preorder traversal.