a. Find a matrix that represents a digital photograph of the + sign. b. Adjust the contrast by changing the black to dark gray and the light gray to white. Use matrix addition to accomplish this. c....

a. Find a matrix that represents a digital photograph of the + sign. b. Adjust the contrast by changing the black to dark gray and the light gray to white. Use matrix addition to accomplish this. c. Adjust the contrast by changing the black to light gray and the light gray to dark gray. Use matrix addition to accomplish this.