Each summer, farmers compete to grow the largest pumpkin, which can weigh thousands of pounds. they go to great lengths to help their pumpkin grow, including using extra fertilizer, heaters on cool spring days, and enclosures to reduce herbivory by insects. suppose that botanists measure the variation in pumpkin weight due to genetic composition and environmental factors. they measure variation in standard deviations. variation due to genetic composition equals 254 pounds, whereas the variation due to environmental factors equals 385 pounds. from these data, calculate the phenotypic variance in pumpkin weight.