write a C++ code help please with flowchart for task 1 & 2 & 3 please

Tasks Task1: Write a C++ program that prompts the user to input two numbers, save the first number in x, save the second number in y, then swap the two numbers. Solution: (flowchart + Program) Task2: Write a C++ program that prompts the user to input three integer numbers, if one of the numbers are negative then compute the sum, otherwise find the largest number among them. Solution:{flowchart + Program) Task3: Write a C++ program that prompts the user to input three student's grades (quiz, mid-term, and final scores), then compute the average of the grades, and determine the grade based on the following rules: -If the average score =90 then grade=A - if the average score >= 70 and =60 and