Question *4: [25 marks] b) Then explain how you delete the root. you delete the root of the BST while maintaining it as a BST. Explain and illustrate diagrammatically how the infixed expression 325+8/2 can be converted into postfix form, and give the postfix form. Then, starting from obtained postfix form, explain and illustrate diagrammatically how to evaluate the same expression 325+8/2. Question *4: [25 marks] b) Then explain how you delete the root. you delete the root of the BST while maintaining it as a BST. Explain and illustrate diagrammatically how the infixed expression 325+8/2 can be converted into postfix form, and give the postfix form. Then, starting from obtained postfix form, explain and illustrate diagrammatically how to evaluate the same expression 325+8/2