8x . Use - co and co when appropriate. Find the limits in a), b), and c) below for the function f(x) = X - 3 a) Select the correct choice below and fill in any answer boxes in your choice. O A. lim f(x) = X-3 (Simplify your answer.) O B. The limit does not exist and is neither - co nor co. b) Select the correct choice below and fill in any answer boxes in your choice. O A. lim f(x) = x-+3* (Simplify your answer.) O B. The limit does not exist and is neither - co nor co c) Select the correct choice below and fill in any answer boxes in your choice. O A. lim f(x)=