Math Calculus please show full working and answer asap.

1. (10 points) Consider a double integral f f dA = ], fy- 6(x, y) dA, where 6 (x, y), mass density of R, is defined by the distance from x = 1. (A) Sketch R. (solution) (B) Find 6 (x, y). (solution) (C) What is the practical meaning of the double integral? (solution) (D)-(H) You use additions only if you need to do so. Include the integrand in your answers. (D) Write the double integral using the order of dydx. DO NOT evaluate. (solution) (E) Write the double integral using the order of dxdy. DO NOT evaluate. (solution) (F) Write the double integral using the order of drde. DO NOT evaluate. (solution) (G) Write the double integral using the order of dedr. DO NOT evaluate. (solution) (H) Set-up (Do not compute) an integral to express the average mass density of R. (solution)