reate a uml class diagram with this code: class Main:     def sum(self, i, n):         sum = 0         for j in range(1, n+1):             sum+=int(i*j)         return sum while True:     try:         i = input("i=")         n = int(input("n="))

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A: Java Program Code Given Below:

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A: As per company guidelines, we can only answer the 1st question.

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A: I have written code below:

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A:

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A: The question has been answered in step2

Concept of Pointer Parameter

Pointers are the special variable that stores the variable address, instead of storing the variable value. Pointer is a powerful feature of a programming language. A pointer is mostly used to save memory space and improve execution time.