Question: Illustrate Problems 30 and 31 for the parabola y = 1/4 x2 + 2by plotting (in the same graph window) the parabola, its directrix, its

Illustrate Problems 30 and 31 for the parabola y = 1/4 x2 + 2by plotting (in the same graph window) the parabola, its directrix, its focal chord parallel to the x-axis, and the tan-gent lines at the ends of the focal chord.

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