Field observations suggest that a migrating ruby-throated hummingbird can fly across the Gulf of Mexico on a nonstop flight traveling a distance of about 800km . Assuming that the bird has an average speed of 40.0km/hr and an average power consumption of 1.70W , how many grams of fat mfat does a ruby-throated hummingbird need to accomplish the nonstop flight across the Gulf of Mexico?Express your answer in grams.