Please show your input and output screenshot of matlab.

Load the image of the brain found in brain.mat, display the original, and apply several mathematical operations. A) Invert the image: make black white and white black. B) Apply a nonlinear transformation: make a new image that is the squareroot of the pixel value of the original. (Note that this requires only 1 line of MATLAB code.) Create a doubly thresholded image. Set all values below 0.25 in the original image to zero (black), all values above 0.5 to 1.0 (white), and anything in between to 0.5 (gray). (In this exercise, it is easier not to use caxis to set the grayscale range. Just let the pcolor routine automatically adjust to the range of your transformed images.) These images should be plotted using the bone colormap to reproduce the grayscale image with accuracy, but after plotting out the figure you could apply other colormaps such as set, hot, or hsv for some interesting pseudocolor effects. Just type colormap(hot), and so on