Q7: [7 MARKS] Undergraduate students signed up for a study on PREP, which they were told examined performance anxiety. Participants attended the study session in a lab on campus, and were assigned the task of performing a comedy skit in front of a group of 4-5 other students. While each participant performed the skit, two researchers sat at the back of the room and independently scored whether the following behaviours occurred: (a) blushing, (b) touching hair, (c) looking down, (d) stuttering, (e) trembling. The researcher's scores are presented below: Blushing Touching hair Looking down Stuttering Trembling Researcher 1 Researcher 2 PS295 OC W2023 | 4 A. Calculate the interrater reliability using the percentage agreement method (from Lab 4). Provide the formula and show all your work. B. Based on the cut-off/standard we used in lab, is there sufficient interrater reliability between the two researchers? Explain why or why not. C. Could observer effects have affected the construct validity of the observational session? Briefly explain why or why not.