Crossword puzzle clue "line four"

Collection consisting of four plates, four saucers, four bowls, etc.

Add vertical line 13 (word 3) and vertical line 3 (word 1) together and enter the answer to the resulting clue on this line

Add vertical line 9 (word 2) and vertical line 7 (word 2) and enter the answer to the resulting clue on this line

Add vertical line 1 (word 1) and vertical line 15 (word 3) and enter the answer to the resulting clue on this line

Add vertical line 15 (word 1) and vertical line 1 (word 3) and enter the answer to the resulting clue on this line

City where four presidents and four vice presidents served as governor

Skeletal parts, four of which can be found in rows four, seven, nine, and twelve

Four-four, e.g.