4. Read the producer-consumer problem with bounded buffer. In the following code, a) when in = 0 and out = 0. what will happen? Please explain. (10 points) b) when in = 9 and out = 0, what will happen? Please explain. (10 points) #define BUFFER_SIZE 10 typedef struct } item; item buffer[BUFFER_SIZE); int in = 0; int out = 0; item next_produced, while(true) { produce an item in next produced while (in-1). BUFFER_SIZE == do nothing