The following program implements a solution to the producer-consumer problem using three semaphores. The function consumer() is incomplete. Copy the function consumer() to your answer script and complete the function so that the program works correctly by filling in the shaded areas with your codes. semaphore s = 1, n = 0, e = 10; void producer() {while(true){Produce(); semWait(e); semWait(s); Append(); semSignal(s); semSignal(n);}} void consumer() {while(true){ Take(); Consume();}} void main() {parbegin(producer, consumer);} (d) Briefly explain the function of each semaphores s and n and the meaning of their corresponding semaphore values in part (c)