A dish of lasagna is being heated in a microwave oven. The effective area of the lasagna that is exposed to the microwaves is 1.3 10-2 m2. The mass of the lasagna is 0.21 kg, and its specific heat capacity is 3400 J/(kg·C°). The temperature rises by 80.0 C° in 7.0 minutes. What is the intensity of the microwaves in the oven?