Question 1 1 pts It is known that fo fo emin (:, y) dyda = ae3 + b, where a, b are integers. Determine the value of a - b.Question 2 1 pts Let a > 0. Let R be the parallelogram on the cy-plane with vertices (0, 0), (1, 0), (2, a), (1, a). It is known that Determine a.Question 3 1 pts Let at, y) : my and R the circular disk of radius V 48 centered at the origin on the my plane. Given the surface area of the graph of f over R is Tm, nd a