Given the Following Equilibrium Constants,
K_a (HSO₄^-)= 1 $\times$ 10^-2
K_b (CH₃CO₂^-)= 5

Given the following equilibrium constants,
K_a (HSO₄^-) = 1.2 $\times$ 10^-2
K_b (CH₃CO₂^-) = 5.6 $\times$ 10^-10
K_w = 1.00 $\times$ 10^-14
Determine the equilibrium constant for the reaction below at 25 ^$\circ$ C.
HSO₄^-(aq) + CH₃CO₂^-(aq) SO₄^2-(aq) + CH₃CO₂H(aq)

A) 6.7 $\times$ 10^-12
B) 2.1 $\times$ 10^-7
C) 1.5 $\times$ 10^-3
D) 6.7 $\times$ 10²
E) 2.1 $\times$ 10⁷