2.8.8) A recreational equipment supplier finds that among orders that include tents, 30% also include sleeping mats. Only 6% of orders that do not include tents do include sleeping mates. Also, 18% of orders include tents. Determine the following probabilities: (a) The order does not include sleeping mats. (b) The order includes a tent given that it does not include sleeping mats. (c) The order does not include a tent given that it includes sleeping mats? 2.9.2) Decide whether a discrete or continuous random variable is the best model for each of the following variables: (a) The time until a projectile returns to earth. ( b ) The number of times a transistor in a computer memory changes state in one operation. (c) The volume of gasoline that is lost to evaporation during the filling of a gas tank. (d) The outside diameter of a machined shaft measured to the nearest millimeter. (e) The outside diameter of a machined shaft