Tell whether the shape of each of these population distributions would be left-skewed, right-skewed, or symmetric: 5(a). Length at birth of all full-term babies born in a particular year [ Select ] 5(b). Income of all full-time workers in the United States [ Select ] 5(c). Statistics exam scores (remember that there are students who take exam unprepared) [ Select ] 5(d). Household size in the United States