{cl In a manufacturing process that laminates several ceramic layers, 5% of the assemblies are found to be defective. Assume that the assemblies are independent. What is the mean and the standard deviation of the number of assemblies that need to be checked to obtain six defective assemblies? Also determine the minimum number of assemblies that need to be checked so that the probability of at least one defective assembly exceeds 0.98. [4 points] {d} A university warehouse has received a shipment of 20 printers, of which 8 are laser printers and 12 are inkjet models. If 5 of these 20 are selected at random to be checked by a particular technician, what is the probability that at least 3 inkiet printers are selected? [3 points]