Please answer this. I will give you a very good feedback. THANK YOU

Three tables listed below show "random variables" and their "probabilities." However, only one of them is actually a probability distribution, See the attached tables. X P(x) X P(x) X P(x) 5 0.4 5 0,1 5 0.5 10 0,3 10 0,3 10 -0.3 15 0.1 15 0,2 15 -0,2 20 0.1 20 0,4 20 0.5 a) Which is it? (You don't have to answer this, just choose the correct probability distribution) b) Using the correct probability distribution, find the probability that x is: 1) Exactly 15 or P(x =15). 2) No more than 10 or P(x 10) 3) More than 15 or P(x > 15) c) Compute the mean, variance and standard deviation of this distribution, 4-5) Mean A 6-7) Variance a? 8-9) Standard Deviation o