15. Explain theoretically how we would delete a node with two children in a BST and pro- vide a model coding example by providing screenshot of output - it can be either a standalone example or you can apply it on the above exercise.[5 points] 16. Provide a real-world problem that trees are applied. Then provide the correspondent C code.[7.5 points] 17. Design a flowchart that shows all the steps for the above coding question? Explain what is the difference between schematic design and flowchart design? [15 points]