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4. [0.15/0.47 Points] DETAILS PREVIOUS ANSWERS SCALCET8 6.2.063. MY NOTES ASK YOUR TEACHER PRACT Consider the following. -aR ebr (a) Set up an integral for the volume a solid torus (the donut-shaped solid shown in the figure) with radii br and aR. (Let a = 6 and b = 6.) 2r X 48TURV 3672 - 12 dy O (b) By interpreting the integral as an area, find the volume V of the torus. V = 1202R X Need Help? Read It Watch It6. [010.47 Points] DETAILS PREVIOUS ANSWERS SCALCET8 6.2.070. MY NOTES ' ASK YC A hole of radius r is bored through the center of a sphere of radius R. Find the volume V of the remaining portion of the sphere. Need Help? -1. [0/0.0 Points] DETAILS PREVIOUS A Evaluate the integral. N 5 arctan dx X 1 57t V 3 5TC 3 In (2) x Need Help? Read It