The following data set shows the number of hours of sick leave that some of the employees of Bastien's, Inc. have taken during the first quarter of the year (rounded to the nearest hour).

19 | 22 | 27 | 24 | 28 | 12 |

23 | 47 | 11 | 55 | 25 | 42 |

36 | 25 | 34 | 16 | 45 | 49 |

12 | 20 | 28 | 29 | 21 | 10 |

59 | 39 | 48 | 32 | 40 | 31 |

a. | Develop a frequency distribution for the above data. (Let the width of your classes be 10 units and start your first class as 10 - 19.) |

b. | Develop a relative frequency distribution and a percent frequency distribution for the data. |

c. | Develop a cumulative frequency distribution. |

d. | How many employees have taken less than 40 hours of sick leave? |