A bitmap image is composed of pixels. Each pixel in the image is represented as four values: three for the primary colors (red, green and blue - RGB) and one for the transparency information defined as an alpha channel. In this problem, you will compare the performance of direct mapped and 4-way associative caches for a square bitmap image initialization. Both caches have a size of 128 bytes. The direct mapped cache has 16-byte blocks while the 4-way associative cache has 8-byte blocks. You are given the following definitions typedef struct unsigned char r; unsigned char g: unsigned char b; unsigned char a; > pixel_t: pixel_t pixel[16] [161: int i, j: Also assume that sizeof (unsigned char) = 1 pixel begins at memory address 0 Both caches are initially empty .The array is stored in row-major order *Variables i and j are stored in registers and any access to these variables does not cause a cache miss