A few years later (2023) , the Association of Veterinarians learned that some dog owners who had participated in the study from Question 3 had since adopted another dog. The veterinarians were curious whether happiness scores were now significantly higher among these 5 dog owners . Their summary data are below. Is there evidence that having two dogs ( versus 1) has significantly increased happiness scores? Participent # Happiness Score 2023 Happiness score 2019 1 77.1 64.8 2 71.2 53.7 3 68.2 71.2 4 73.8 70.9 5 76.6 75.4 a . State your null and alternative hypotheses. b . Calculate the test statistic, and state the critical value. Use alpha of 0.05 . c . Do you conclude that happiness scores have significantly improved? Show the calculations