Exercise:Colours into tones in black and white

I have chosen to use the same items, near enough, to get the same results.  I have used lemons for the yellow and a Red Bull can for the blue.
As instructed I took the shot required and transferred to photoshop.  Well I must say I liked this exercise, I learnt something new.  I haven't used Photoshop too much and always love finding a new technique. Very impressive, learning how to highlight your chosen colour in black and white.

Below are my five pictures to show the effects of colour filters used in black and white.



ORIGINAL

BLACK & WHITE

RED FILTER 

YELLOW FILTER

GREEN FILTER

BLUE FILTER