Explain why the function is discontinuous at the given number a. (Select all that apply.) f(x) = 1 x+5 a = −5 f(−5) is undefined. limx→−5 f(x) does not exist. limx→−5+f(x) and limx→−5−f(x) are finite, but are not equal. f(−5) is defined and limx→−5 f(x) is finite, but they are not equal. none of the above Sketch the graph of the function.