Explain why the function is discontinuous at the given number a. (Select all that apply.) f ( x ) = - a =-1 x+1 lim f(x) and lim f(x) are not finite, and are not equal. O x - -1+ x- -1 lim f(x) does not exist. O x --1 O f(-1) is undefined. *(-1) and lim f(x) are finite, but are not equal. O none of the above Sketch the graph of the function.Sketch the graph of the function. 4 2 2 2 -6 -4 X -2 2 4 6 -6 X - 2 2 4 6 -6 -4 -2 X 2 6 1-2 -2 C -4 2 -6 -4 2 4 6 -2/ C -41