Having a hard time with this question: Help Please

With Replacement:
This is a multi-stage experiment. There are 7 colored cubes in a bag. The colors are purple, blue, red, orange, white, yellow, and green. This is a multi-stage experiment with dependent events. Determine the probabilities of the following events. Express probabilities as fractions.
P(OWB)=
P(PRBO)=
P(GBOWR)=
P(GRBGW)=
P(PBRGOY)=

Since there is replacement, all the events are independent.

So, for n draws, P(any specific n colors) = (1/7)^n