Please answer B and C

3. (3 points) For each set S, determine whether it satisfies each of the 4 listed properties. No justification is necessary. Fill in ALL boxes that apply. If none apply, leave it blank. (unfilled filled ) (3a) 237 \\ B223 (0) O open O path-connected 0 compact O closed (3b) S = {(x, y,z) ER3 : x2 + y2 + z2