The structure of a yard in front of Zenith's house is as shown in the figure. The measurement of each side is as shown in the figure. (i) If the measurement of AE, AD and BD are 20 ft, 6 ft and 14 ft respectively, find the area of the yard. (ii) How many tiles of 1 ft² area are required for the yard? (iii) Find the total cost, if the cost of paving per tile is Rs. 150.