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3.1 Construct and graph the cubic Bezier polynomial from the point (1,1) with guide point (1.5,1.25) to (6,2) with guide point (7,3).
3.2 A natural cubic spline S on [0,2] is defined by:
S(x) = 1 + 2x^3, 0 ≤ x < 0.5
S(x) = 2 + bx, 0.5 ≤ x < 1
S(x) = 1 + cx - 1 + dx - 1, 1 ≤ x ≤ 2
Find b, c, and d.