149. The graph has vertices $(1,2)$, $(2,4)$, $(4,\circ)$, $(\circ,4)$, $(1,5)$, $(3,6)$, $(3,7)$, and $(5,7)$. Among the real numbers, how many have degree 4? (1) $2$ (2) $2$ (3) $4$ (4) $5$
\textbf{149.} The graph has vertices $(1,2)$, $(2,4)$, $(4,\circ)$, $(\circ,4)$, $(1,5)$, $(3,6)$, $(3,7)$, and $(5,7)$. Among the real numbers, how many have degree 4?
(1) $2$ \quad (2) $2$ \quad (3) $4$ \quad (4) $5$