Fisika : Fluida, Panas, Listrik, Gelombang, Cahaya 2021 klas A

We fully submerge an irregular 3 kg lump of material in a certain fluid. The fluid that would have been in the space now occupied by the lump has a mass of 2 kg. 

(a) When we release the lump, does it move upward, move downward, or remain in place? 

(b) If we next fully submerge the lump in a less dense fluid and again release it, what does it do?