\fQuestion 1 O Mark this question Find all the critical numbers of f(x) - 3x X+4 O x= - 8 and X = - 4 O x= - 8, X = - 4, and x = 0 O x= - 8 and x = 0 O x= - 4 and x = 0 SAVE & CONTINUEQuestion 1 O Mark this question Find all the critical numbers of f(x) = 3x2 X+4 O X= - 8 and X = - 4 O x= - 8, x = - 4, and x = 0 O X= - 8 and x = 0 O x= - 4 and x = 0 SAVE & CONTINUEQuestion 4 O Mark this question Determine the local maximum and minimum values of f(x) = x-4x2+ 12 using the second derivative test when it applies. Local maximum value is 12 at x = 0. O 68 Local minimum value is 7 at x = 8 3 Local minimum value is -8 at x = 0. O Local maximum value is 8 at X = Local minimum value is 12 at X = 0. O 68 Local maximum value is 27 at X= 8 3 Local maximum value is -8 at X = 0. O Local minimum value is 8 at X = w /00 SAVE & CONTINUE\fQuestion 6 O Mark this question A rancher has 200 feet of fencing to be used to enclose two adjacent, congruent rectangular corrals. X y X y y X What dimensions of the overall enclosure should be used so that the enclosed area will be maximized? 335 feet by 33 - feet 335 feet by 50 feet 335 feet by 25 feet O 25 feet by 50 feet