black and white editing

Fist select your image.
then go to Image, Adjustments, Black and White.

Then you can choose how dark you want the reds or yellows Etc.

then choose how dark you want the image to be :D

Then go to image, adjustments and then click on brightness/ contrast.

and then do a low contrast picture (shown above).

and then do a high contrast image(shown below).

And there you go you now have black and white image, a low contrast black and white, and a high contrast image.