problem 7. A box contams 78 Functioning Light bulbs and 6 defective 9 points bulbs. The box is approved for shipment if when 4 bulbs are randomly selected and Tested, all 4 work. Find the probability of appoval if the sampling is done: a) without Replacement by with Replacement () In which sampling method ( a or b ) are the selections Independent? a ) c ) problem 8. Consider the data in problem 3. Find each of the Following : 9 points )