Multi-threaded matrix multiplication: in this problem, you are required to write a multi-threaded program for matrix product. calculate each cell of the product matrix p in a separate worker thread. this will involve creating m × n worker threads. the main (or, parent) thread will initialize the matrices a and b and allocate space to hold the matrix p. ideally, these matrices should be declared as global data so that each worker thread has access to these matrices. the parent thread will create m × n worker threads, passing each worker the values of row i and column j that it uses in calculating the matrix product. once all worker threads have completed, the main thread will output the product contained in matrix p. this requires the main thread to wait for all worker threads to finish before it can output the value of the matrix product.