$24.$ Greg Winston works for the federal government. In $2016,$ he got $10$ federal holidays off.

$($Look up the dates of these holidays on the internet.$)$ Greg also got every other Friday off, as well as weekends starting on $1/8/2016.$ Create a list of all the days Greg worked in $2016.$

$25.$ Use LOOKUP functions to compute for a given date and day of the week the date of the most recent day of the week on or before the given date. For example, for $4/30/2021$ and

Wednesday, your formula should return $4/28/2021.$

$26.$ Use LOOKUP functions to compute for a given date and day of the week the date of the next date that occurs on the listed day of the week. For example, for $4/30/2021$ and Monday, your formula should return $5/3/2021.$

$27.$ Write formulas that return the first and last days of the month for the months $12$ months before and after $2/28/2025.$