4. Please provide a step-by-step solution and explain the formulas/reasoning that was used in solving the problem below.4 The health of two independent groups of ten people (group A and group B) is monitored over a one-year period of time. Individual participants in the study drop out before the end of the study with probability 0.27 (independently of the other participants) Calculate the probability that at least 8 participants, from one group (either A or B), complete the study but fewer than 8 do so from the other group.