In a study of possible correlation between the height in cm (x) and weight in kg (Y) of chimpanzees, a sample of 40 animals produces a correlation coefficient of r=+0.813 and a regression line with equation Y = 0.34X + 19.5, What is the expected weight of an 80 cm tall chimpanzee? Select one: a. 34.8 kg b. 177.9 kg c. 46.7 kg d. 24.0 kg