turn a picture into black and white

In this picture I changed the color to black and white. First I changed the (brightness and contrast) then I changed then I opened a Channel Mixer adjustment layer. Then I clicked and checked the box that says Monochrome to make the picture black and white (but don’t click OK yet). You have to adjust the brightness percentages to fit the coloring of the picture. (To adjust the balances click on the sliders and drag them to the left or to the right).Then you will have a nice picture.