Qasr (Shortened Prayers)

How are the 10 days of travel for Qasr prayers counted? If I leave the town after Fajr on the 12th, and I return home after Maghrib on the 22nd, is it obligatory to pray Qasr, or is this considered more than 10 days? Sayyed Mohammad Al-Musawi	If I regularly travel 44 km from Mississauga to attend JCC in Vaughan, both cities within the GTA, do I still need to perform Qasr, or is it exempt due to the routine nature of travel within a single metropolitan region? Amina Inloes
As a wife, in what specific circumstances am I required to shorten my prayers to fulfill my religious obligations? Sayyed Mohammad Al-Musawi	Is it necessary for me to perform Qasr prayers during my 3-4 day visits to my home city while I work in another city 400km away? Sayyed Mohammad Al-Musawi