please help, business calculus, I need # 17, and # 19 only

17- f(x) is continuous on (-, ) and has critical numbers at x = a, b, c, and d. Use the sign chart for f(x) to determine whether f has a local maximum, a local mini-mum, or neither at each critical number.

19- In this Problem give the local extrema of f and match the graph of f with one of the sign charts a-h in the figure on page 253.

In Problems 17 and 18, f(x) is continuous on ( -0o, co ) and has critical numbers at x = a, b, c, and d. Use the sign chart for 25. f' (x) to determine whether f has a local maximum, a local mini- mum, or neither at each critical number. 17. 0 -ND - - - ND + + +0 + + +HOMEWORK SHEET 43 In Problems 19-26, give the local extrema off and match the graph off with one of the sign charts a-h in the figure on page 253. 19. fux) 20. 0+ + +++++ (b) - - -ND + + + + + + + + 21. 22. (c) go) + + + ++ + + + 0++ + + +++4 (d) 40) + ++++ + + +ND+ + + + ++++ (c) 23. 24. so) + + + + + + + +ND- ND 25. 26. (h)