Exercise 4 by Evgeny Roizin

This example demonstrates the geometric properties of parabolas combined with vector operations. It involves core mathematical concepts such as parabolas, complex numbers, 2D vectors, and solid geometry. The construction utilizes GeoGebra commands/objects like Textfield, objects a, b, f, c, inputBox3, d, text1, e, h, p, g, i, j, k, q, l. It is suitable for high school students and educators for teaching demonstrations and explorations.