1. Complete the C++ code below. It should input an ID number and Exam 1 score for every student in CS 180. Use a while loop to input and sum the scores. After all actual ID numbers and scores are input to your program, a really large ID number (at least as large as the named constant ID_MAX) is input along with an irrelevant score. Compute the average Exam 1 score. You need not output anything. Assume that there is at least one student in CS 180. Declare any other variables you need. const int ID_MAX = 999999; // every student ID number is smaller // than 999999 int id_number; // student ID number float score; // student score on Exam 1 float average; // average of all student Exam 1 scores ... cin >> id_number >> score; 2. The C++ code below uses float type variables x, y, z, and square. It computes the square root of the variable square by repeatedly moving x and y closer together so that x*x <= square and y*y >= square until they are so close that either one could be used as the square root. Complete the code below by making the compound statement {...} into a do/while loop that continues until the difference y-x is smaller than 0.001. You may use the literal constant 0.001 in your answer. x = 0.0; y = 100.0; { z = (x + y) / 2.0; if (z*z > square) y = z; else x = z; } 3. Complete the C++ code below. The variable days_in_month contains a count of how many days are in this month. Write a for loop to input a temperature (temp) for every day in this month. When the loop ends the variable warm_days should be the count of the number of days in this month in which the temperature was greater than the constant FREEZING. You need not output anything. Assume that FREEZING has a value. int day; // counter for days in this month int days_in_month; // number of days in this month int warm_days; // number of warm days in this month float temp; // temperature for each day warm_days = 0; 4. In the while loop below explain what happens if xxxxxxx is the break statement. Then explain what happens if xxxxxxx is the continue statement. while (gravity >= air_pressure) { gravity -= force; if (helium > mercury) xxxxxxx; gravity *= deflection; }