Write a program that calls before calling have the main process access a variable (e. g., x) and set its value to something (e. g., 100). what value is the variable in the child process? what happens to the variable when both the child and parent change the value of x?

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0