Customer buyProduct () {

while ( numProduct = = 0) {

signal ( customers);

wait (Product);

}

while (Product.NotEmpty)signal(Product);

numProduct --;

}

Clerk

sellProduct(){

if(numProduct!=0)wait(customers);

numProduct = P;

}

a) Change the code such that it will properly work with a Signal and Exit policy. Consider the monitor concept and not its java implementation.

b) What will be the outcome of eliminating if(numProduct!=0) in the clerk code? Clearly explain and give an execution sequence that shows the outcome.