For each problem, find the points (x, y) where the tangent line to the function is horizontal. 1) S(x) - -x+2x2+ 3 For each problem, find the points (x, y) where the tangent line to the function is horizontal. (HINT: Use the point-slope form for linear equations.) 2) f(x) - -x + x2 +4 al (-1, 6) 3) y = In (-x + 2) at (-3, In 5) For each problem, find the x-coordinates of all critical points, find all discontinuities, and find the open intervals where the function is increasing and decreasing. 4) 8 - -+4 5) 5 (1) -1+1412 + 601 + 76 6) 8 - -s' +6s -3