Three Easy Calculus 1 questions

Please write neatly (do not type) and make sure to include steps. I don't need explanation, just steps. Don't make it overly complicated either please

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D Question 4 4 pts Find all critical points for f (x) = x3 = -6x2 -4 Upload Choose a File D Question 5 4 pts State the intervals for increasing/decreasing/concave up/concave down for f (x) = 13 = -6x2 -4 Upload Choose a File D Question 6 4 pts Find the derivative of y = (3x - 4)2+1 Upload Choose a File