(a) Consider the function f(x) = v x2 - 49. Enter the number of critical pointsumbers of f(x). 2 Determine the x-coordinates of the critical points. Enter your answer as a comma-separated list of values. The order of the values does not matter. Enter DNE if f(x) does not have any critical points. (-7,7) X (b) Consider the function g(x) = v 49 - x2. Enter the number of critical pointsumbers of g(x). 3 Determine the x-coordinates of the critical points. Enter your answer as a comma-separated list of values. The order of the values does not matter. Enter DNE if g(x) does not have any critical points. (-7,0,7) X