A signal is stored in a file named unesco 750-1.raw in CANVAS/FILE page with the size of 375000 bytes. Each element is a byte. Read this sequence into your program in an array of byte, and filter it with a filter (-1, -2,-3,-4, 0, 4, 3, 2, 1) using convolution operation. Output the results into a file output.raw with the same length as input file. The program should use C/C++.