Please help me answer these with full solution please ill give like if i understand all

Find the mean, variance, and standard deviation of the following probability distribution then interpret the computed values. Write your answer in your answer sheets. 1. Variable z representing the number of male teachers per Elementary school. Z 2 3 4 5 6 Pizi 40% 32% 1 1% 9% 8% 2. The number of mobile phones sold per day at a retail store varies as shown in the given probability distribution below. Find the expected number of mobile phones that will be sold in one day. X 30 33 38 40 50 0.2 0.2 0.35 0.23 0.02 3. Number of monthly absences of Juan Dela Cruz based on his previous records of absences as presented in the probability distribution below. Number of Absences (X) Percent P(x) 3 25% 30% 30% 15% 4. The number of computers sold per day at a local computer store, along with its corresponding probabilities, is shown in the table below. Number of Computer Sold X Probability P(x] 0.1 D.2 0.3 D.2 0.2 5. The number of inquiries received per day by the office of Admission in SHS X last enrolment is shown below. Number of Inquiries X Probability P(x] 22 0.08 25 0.19 26 0.36 28 0.25 0.07 30 0.05