A new gym has registered the following number of new members in each month of 2009. The number of new members registered each month can reasonably be expected to follow a normal distribution. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 30 100 90 82 132 211 215 13 91 36 32 23\f(b) Using normal approximations, construct a 90% interval for the lower quartile obtained in (a). (5) (c) Is the normal approximation appropriate here? Give a reason for your