b) Suppose there are four students in a class. Following are there obtained marks: i) Susan: 70 ii) ALex: 35 Alan: 90 John: 44. iii) iv) The marks of each student are stored in a tree in such a way that marks greater than 50 are placed in the right side of 50 and marks lesser than 50 are placed in the left. Now another student is enrolled in the class and you need to store his marks as well. Write a C++ code to insert his marks in exactly the same way the previous students' marks have been entered.