Let random variable Y denote how many quarters in a calendar year the U.S. is in an official recession. Which of the following is the most plausible PMF for Y? OP(Y=4)=1 OP(Y=y)=1/4, y=0,1,2,3,4 OP(Y=0)-0.7, P(Y-1)-0.12. P(Y-2)=0.08, P(Y=3)=0.06, P(Y=4)=0.04 OP(Y=y)=0 if y is odd, P(Y-y)-1/2 if y is even and 0