i need help on part D

Question 3 - 12 points The random variable X is the number of houses sold by a realtor in a single month at the Sendsom's Real Estate office. Its probability distribution is given in the following table. Houses Sold 0 1 2 3 4 5 6 7 Probability 0.24 0.01 0.12 0.16 0.01 0.14 0.11 0.21 a) What is the probability the number of houses sold by a realtor in a single month at the Sendsom's Real Estate office is more than 4? [A] 0. 47 b) What is the probability the number of houses sold by a realtor in a single month at the Sendsom's Real Estate office is less than 3? [B] 0. 37 c) What is the mean? [C] 0. 125 d) What is the standard deviation? [D] (Round answer to 3 decimal places.) 125 Question 4 - 18 points JET- 1257 alls reach a live