Write a multithreaded program that calculates pi using the above formula by dividing the iterations in the for loop among the threads. To simplify the computations, let's assume that the number of working threads is 2 and n=1000000. After the two working threads split the iterations and each thread has its own local sum, they update the global variable sum, and the parent thread will output the sum (i.e., pi estimation) once the workers have exited. Note that if there is a critical section, you need to protect it from the race condition. Option 2. 7=41- 1 1 + for (i = 0; i Write a multithreaded program that calculates pi using the above formula by dividing the iterations in the for loop among the threads. To simplify the computations, let's assume that the number of working threads is 2 and n=1000000. After the two working threads split the iterations and each thread has its own local sum, they update the global variable sum, and the parent thread will output the sum (i.e., pi estimation) once the workers have exited. Note that if there is a critical section, you need to protect it from the race condition. Option 2. 7=41- 1 1 + for (i = 0; i