I have yield data of a field. Almost quarter million of polygons with the size of 30ft by 1.2ft representing the yield of the region. I have been asked to concentrate (dissolve) every 5 polygons, thus the result will be 30 ft by 6ft (1.2*5). The new polygon will contain the average yield of the old 5 polygons. I need to contrate them from left to right. Is there any way to do that?