An enclosed room with internal dimensions 4 m x 3 m x 2.4 m high is to be electrically heated to maintain the inside temperature at 25°c, when it is 5°c outside. the room has one window 1.2 m x 1.8 m and a sliding glass door 2.4 m x 2.1 m. the thermal conductivity k of each construction material is given below. walls: brick (200 mm thick) 1.00 w/(m. k) window and door: single glazed (6 mm thick) 1.40 w/(m. k) ceiling: plasterboard (13 mm thick) 0.15 w/(m. k) ignore the effects of - joins at the corners of the room, the roof above the ceiling, any furnishings, the presence of humans, orientation to the sun or any wind exposure. assume there is no heat loss through the floor and there is no requirement to initially heat the air in the room. calculate the power output of the electric heater required to maintain the specified temperature. you are required to tabulate your calculations providing one row for each part of the building's structure and use column headings of structural element, area, thermal conductivity, thickness and heat transfer rate, including suitable units. the total heat transfer rate should be provided at the bottom of the table. provide a table number and a suitable caption for your table. marks will be awarded for correct formatting.