A large container used in food processing contains hot oil at 200C. Around the container a cooling jacket is installed which is set at 60C. The walls of the container and the cooling jacket are separated by an air space with a height of 35 cm and a width of 3 cm. a) Estimate the amount of free convection heat loss per square meter of surface area. b) How does the width of the air space affect the value of heat loss in the container? c) What can be done to reduce the heat loss that occurs?