Samantha wants to conduct an experiment to see whether or not pets can reduce physiological stress (measured via heart rate and blood pressure) compared to a (human) friend. She is trying to decide (a) how to divide participants into conditions and (b) what the experimental manipulation should be. Past studies have shown that being asked to give a speech in the lab is a very effective way of inducing stress. Below is her current plan: (a) Dividing participants: before the study, ask participants if they have a pet; if they have a pet, they get the 'Pet' condition; if they do not have a pet, they get the 'Friend' condition. (b) Experimental manipulation: in the 'Pet' condition, participants are asked to give a speech while their pet is present in the room. In the 'Friend' condition, participants are asked to have a conversation with their friend before arriving at the lab and then give a speech with no one else in the room. For each aspect of Samantha's plan (dividing participants and the experimental manipulation), indicate yes/no of whether that is a good plan and explain why her decision satisfies or fails to satisfy the requirements for a true experiment. You should have two sets of yes/no + why responses (one for dividing participants and one for experimental manipulation).