Determine whether the following is a probability distribution. If not, identify the requirement that is not satisfied. P(x) 0 0.260 1 0.308 2 -0.041 3 0.057 4 0.280 5 0.136 Probability distribution. Not a probability distribution. One of the P (x)'s is negative. O Not a probability distribution. The sum of the P (x)'s is not 1