Assume that the database system uses 1 byte to store a NULL value and 9 bytes to store each EID value, and that there are 200 professors out of whom 16 serve as chairpersons. Select below all the correct statements. The correct ones taken together should give an explanation and conclusion of which of the two methods is better in terms of storage usage. Storage requirement for Chairperson data in the general method: 144+16d bytes Storage requirement for Chairperson data in the general method: 1800+16d bytes Storage requirement for Chairperson data in the second method: 200+16d bytes Storage requirement for Chairperson data in the second method: 184+16d bytes The general method is more efficient The second method is more efficient