Please used wait and signal written in C

4. This problem is an extension of Consumer-Producer Problem'. Provide C-like codes for processes in the problem "One Consumer and both Producers'. In this problem, there are two producers and each producer has its own buffer (with X, and Y slots, respectively). Producers behave in the usual way. The only consumer takes, in each iteration, one item from each buffer. 5. This problem is an extension of Consumer-Producer Problem'. Provide C-like codes for processes in the problem None Consumer and any of two Producers'. In this problem, there are two producers and each producer has its own buffer (with M, and N slots, respectively). Producers behave in the usual way. In each iteration, the consumer takes one item from either buffer. Hint: Only if both buffers are empty then the consumer is blocked, and it should be unblocked when any of buffers receives an item. In all problems above, use semaphores as only synchronization mechanisms. Busy waiting solutions are not allowed. Do not over-synchronize, i.e. do not unnecessary block a process