Question 5 if you launch a projectile from the origin, the trajectory of the projectile is a downward-pointing parabola. a. write the function y(x) for this parabola using the equations of motion in terms of vix and viy without using sine and cosine and, of course, g. this is also an equations of motion; one that does not explicitly contain the time and in two dimensions. this is the standard form for a parabola. y=-m(x - h)^2 + k b. find the vertex of the parabola (h, k). what is scale factor m? c. re-write the function y(x) in this form. d. repeat question 4 using the standard form of the parabola.