Solve the following integral: where the region R is: =ff₁₂₁²- R Consider the change of variables: I = +−(z+s) drdy R = {(x, y) = R² : 0 ≤ y ≤ x, 2 ≤ x + y ≤ 3} u= x + y Y x V= 1. Draw the region R both in the x - y plane and in the u- v plane. 2. Invert the system writing the coordinates and y as function of u and v. 3. Use the change of variables from x - y to u- v to solve the integral I.

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