The experimental probability a player will move 2 spaces and 5 spaces during a game

Iam so stuck. what is the worked out answer for this question?

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Which is the focus of a parabola with equation y2=4x