1, 4, and 12. Omit problem 11. Complete at least two more speed problems, two velocity problems, and #13 SHOWING ALL WORK. please help me on this, i have to turn it in by the end of the day and its a test grade you can use the file or doit on a piece of paper or type it up idc just please

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.