a. $f(\rho, \theta, \phi) = \rho sen\phi(cos\theta + sen\theta)$,
$E = \bigg\lbrace (\rho, \theta, \phi)|1 \le \rho \le 2, 0 \le \theta \le \pi, 0 \le \phi \le \pi/2\bigg\rbrace$
b.
$$\int_0^{\pi}\int_0^{\pi/2}\int_1^2 \rho^3 cos\phi sen \phi d\rho d\phi d\theta = \frac{15\pi}{8}$$