STEP 2
In this step we are going to desaturate our image. By desaturation we mean to remove all the color from the image and simply turn the image to Black and White. There are lots of method to turn an image to black and white but we are going to use simplest amongst them. Go to Image>Adjustment>Desaturate or you can press Ctrl+Shift+U/Cmd+Shift+U as keyboard shortcut.