Create a rolling 3 period consecutive measure

I have a difficult measure I'm trying to build.  It relates to employees billing hours to timesheets.  We need to flag employees who bill more than 19 hours for 3 consecutive weeks.  Take a look at the following screenshot:

I've highlighted what I need to be calculated in yellow.  Note that for employee 73 and 1523, they have 4 consequtive periods billing more than 19 hours, so week 3 and 4 of that block would report a 1.  But note that you can't do a rolling average beacuse employee 1279 should not have any value in the week of Jan 16.  The other requirement is I need the count of employees to roll up as shown in bottom row.  (It would obviously be more than 1, 2, and 1 because the table is large.  But based on what is visible and what I marked up, it should be those values.)

Hopefully that gives you clear enough requirements.  Let me know if you have any questions.  Here is a onedrive link to a sample powerbi workbook you can start with.  Thanks in advance!