Tracing a portion of a graph and moves along that portion using Manim updater

This post is about Manim code for tracing a portion of a graph and assigning a dot to move along that portion. In this animation, we created a cubic graph with y = x3 - 3x2 + 2x + 1.5 and trace a portion of this curve between x = -0.3 and x = 2.2 then assign a point to move along this portion.