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 1 4 pts Using calculus determine the exact number of x-intercepts for f [3;] sure to show all your wo rl-c. Upload Choose a File Fincl the extrema for the function f [1:] = 4.1::2 Sm - 12 between [0,2], he sure to show all your work, you MUST use calculus not graphing to answer this question. Upload Choose a File Determine when the instantaneous rate of change equals the average rate of change for the function f[: J = 5:3 x? + 91 + E between [[1,2] Upload Choose a File