I need help with these van de graaf questions. The metal sphere is charged by the Van De Graaf and is not on any surface

2. After the metal sphere was charged, the Van De Graaff generator was turned off. A) Is the metal sphere safe to touch without personal protective equipment? B) If a copper wire was attached to the surface of the sphere and a metal rod jutting out of the ground, what would the change in potential be across the wire? C) After attaching the metal copper wire, is this sphere safe to touch without personal protective equipment? Explain why