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7a) Consider a room in a house that has composite walls with an Rtt-1.5 m2K/W. The total cross sectional area of the walls is 35 m During winter, the temperature outside the room is Tout5°C. Inside the room, there is an electric heater that emits heat at a rate of 200 W The room is occupied by 2 people that emit heat at a rate 80 W each. What is the temperature inside the room (in °C)? Express your answer with 1 decimal place 7b) How much will it cost (in $) to keep the heater ON during the winter season if the heater has an efficiency of 50%? Assume that you keep the heater ON for 5 hours/day. Assume the winter season lasts 65 days. The cost of electricity is $0.12 per kW h. Express your answer with 1 decimal place

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sven 35 Temperate in Yoom (O-28 +5 5.3 C 2000 - 15.6 s dollaw

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