I need solve this assignment of MATH 312 by hands

Question # 5. Computer chips often contain surface imperfections. For a certain type of computer chip, the probability mass function of the number of defects X is given by X 0 1 2 3 4 F (x) |0.4 0.3 0.15 0.10 0.05 A. Find P ( X 22). B. Find the mean number of defective chips. C. Find the variance of the number of defective chips. Question # 6. A bicycle manufacturer makes two mountain bike models that each come in three colors. The following table shows the production volumes for last week: Color Model Blue Red White De Luxe 300 135 210 Supreme 140 95 120 A. What is the probability that a manufactured item is red? B. What is the probability that the product manufactured is De Luxe? C. What is the probability that a product manufactured is Supreme and white? D. What is the probability that the product manufactured is De Luxe given that it is blue