please explain clearly

1. Q1. In your system there is only one printer and there is a queue for the files to wait to be printed. The size of the queue is limited to N. There are processes sending files to be printed to the queue. If there is no space left in the queue, sending process waits. The printer reads the first file in the queue, prints it and goes for the next one. If there is no file in the queue, the printer waits for a file. By using semaphores, write the functions to control the actions of senders and the printer. 2. Two semaphores S1 and S2 are both initialized to 1 in a system. Two threads T1 and T2 are executing following codes. Explain the possible problem in these codes? (how deadlock may occur?) T1 \begin{tabular}{ll} wait(S1); & wait(S2); \\ wait(S2) & wait(S1) \\ ..... &....... \\ signal(S2) & signal(S1); \\ signal(S1) & signal(S2); \end{tabular}