Please may I get some help! I'm really confused !

Chapter 3: Discrete random variables and their probability distributions (a) The probability that a driver order is late is 0.05. Three orders are placed far enough apart in time that they can be considered to be independent events. (i) What is the probability that all are on time? (3) (ii) What is the probability that exactly one is not on time? (5) (iii) What is the probability that two or more orders are not on time? (5) (b) In a certain population, 50% of the population are COVlD-1 9 free; 30% have COVlD-19 symp- toms; and 20% have severe COVlD-19 symptoms. (i) What is the probability that a randomly chosen person from the population is either COVlD-19 free or has severe COVlD-19 symptoms? (2.5) (ii) What is the probability that a randomly chosen person from the population is either COVlD-19 free or has COVlD-19 symptoms? (2.5) (c) If the probabily mass function of X is p(x) = (0.75)(0.25)x, x = 0, 1,2, determine the following probabilities: (i) P(X = 2) (3) (ii) H}! s 2) (3) (iii) P(X > 2) (3) (iV) P(X 2 1) (3)