What Is the PH of a 0 $\times$ 10^-5 at 25°C $\times$

What is the pH of a 0.28 M solution of sodium propionate,NaC₃H₅O₂,at 25°C? (propionic acid,HC₃H₅O₂,is monoprotic and has a K_a = 1.3 $\times$ 10^-5 at 25°C..K_w = 1.01 $\times$ 10^-14 )

A) 6.26
B) 4.83
C) 11.10
D) 7.74
E) 9.17