The lifespans of seals in a particular zoo are normally distributed. The average seal lives 13.8, years; the standard deviation is 3.23.23, point, 2 years. Use the empirical rule (68-95-99.7\%)(68−95−99.7%)left parenthesis, 68, minus, 95, minus, 99, point, 7, percent, right parenthesis to estimate the probability of a seal living less than 7.47.47, point, 4 years.