Answer
$\begin{matrix}
S&N\\
B&I
\end{matrix}$
Work Step by Step
1-2: too broad of a definition to be conclusive
3-4: only metal in group 5A is bismuth (Bi)
1-3: metalloid with the second symbol letter being B: Antimony (Sb)
2-4: metals used in US coins: Cu, Ni, Zn, second letter being i: nickel (Ni)
Checking:
1: S is yellow as a solid and red as a liquid, a nonmetal.
2: N is colorless and gaseous at room temperature, a nonmetal.
3: B does make fireworks green.
4: I is used to treat hypothyroidism.
1-4: Si is used to make electronic components.
2-3: Nb is used to make superconducting magnets.
$\begin{matrix}
S&N\\
B&I
\end{matrix}$
