The incubation time for a breed of chicks is normally distributed with a mean of 28 days and standard deviation of approximately 3 days. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all eggs eventually hatch.) Area Under a Normal Curve 2.35% 13.5% 34% 34% 13.5% 2.35% H - 30 M - 20 LL uto u + 20 u+ 30 68 95% 99.7% (a) in 22 to 34 days chicks (b) in 25 to 31 days chicks (c) in 28 days or fewer chicks (d) in 19 to 37 days chicks