Lily wants to teach her younger sister, Addie, about probability using a jar full of multicolored marbles. The jar contains a total of 44 marbles in four different colors. Of the marbles in the jar, 11 are red, 15 are blue, 13 are green, and 5 are yellow. Lily and Addie take turns drawing random handfuls of marbles out of the jar and tallying their results, returning each marble to the jar after a handful is drawn and results have been tallied. 1.5 points

What is the probability that they will draw:
a. A yellow marble?
b. A blue or green marble?
c. What is the probability that they WILL NOT draw a red marble?