Two numbers are selected at random (without replacement) from the first 7 natural numbers. If x denotes the smaller of the two numbers obtained, find the probability distribution of x.
a) P(x=1)=1/7, P(x=2)=2/7, P(x=3)=3/7, P(x=4)=1/7
b) P(x=1)=1/7, P(x=2)=2/7, P(x=3)=2/7, P(x=4)=2/7
c) P(x=1)=1/7, P(x=2)=1/7, P(x=3)=2/7, P(x=4)=3/7
d) P(x=1)=1/7, P(x=2)=1/7, P(x=3)=1/7, P(x=4)=4/7
