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11.

area for lower left = 52*62 = 3224

area for upper right = 68*54 = 3672

 total area = 3224 + 3672 = 6896 square yards


12.

 area of upper left = 57-69 = 3933

area of lower right = 24*37 = 888

total area = 3933 +888 = 4821 square feet