Please help me :3i need serve help with this i keep getting stuck on it

What is the total area of the figure?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).