7-19: Like hurricanes and earthquakes, geomagnetic storms are natural hazards with possible severe impact on the Earth. Severe storms can cause communication and utility breakdowns, leading to possible blackouts. The National Oceanic and Atmospheric Administration beams electron and proton flux data in various energy ranges to various stations on the Earth to help forecast possible disturbances. The following are 25 readings of proton flux in the 47-68 kEV range (units are in p/(cm2- sec-ster-MeV)) on the evening of December 28, 2011: 2310 2320 2010 10800 2190 3360 5640 2540 3360 11800 2010 3430 10600 7370 2160 3200 2020 2850 3500 10200 8550 9500 2260 7730 2250 a) Find a point estimate of the mean proton flux in this time period. b) Find a point estimate of the standard deviation of the proton flux in this time period. c) Find an estimate of the standard error of the estimate in part (a). d) Find a point estimate for the median proton flux in this time period. e) Find a point estimate for the proportion of readings that are less than 5000 p/(cm2-sec-sterMeV).