DURATIONS & HISTOGRAM

I am using 3 different calendars: 1). Standard 5 day week - 8 hour days with holidays; 2). 4 day week - 10 hour days; and 3). 7 day week – 12 hour days. The resources I’m allowed to use are limited to only 8 hour days.

Problem 1: How do I reflect the correct duration of 26 days on an activities using the 7 day – 12 hour calendar as being between April 1 and April 26 instead of the 38 day duration that is currently indicated.

Problem 2: How do I correctly reflect on the histogram the true number of personnel required based on the budgeted man hours for each of the calendar types?