A factory makes glass bottles.

 A customer can place an order for either 10 transparent or 10 painted bottles.

 There are glass blowers, painters and packers in the factory.

 As long as an order is not placed, no glass is blown.

 As long as a bottle is not blown, no bottle is painted.

 If the order is for transparent bottles, the painter does not work, and the bottles are passed to the packer.

 If the order is for painted bottles, the painter paints them and passes them on to the packer.

 The packer does not work as long as he does not receive bottles. The packer places 10 bottles in a crate, after which he tells the customer that the order is ready.

 The customer must not try to pick the order before it is ready.

 A new customer must not place order before the previous one picks his order.

 Insert necessary synchronization and mutual exclusion with semaphores in the given code. Do not forget to initialize them. You may use if-else structures. If you use them, place opening and closing brackets for them correctly.