The higher priority task can arrive at most 3 times and as 27+12*3=65<150 ms and hence, T2 is schedulable.This is also schedulable for task T3, we need to check its 52 millisecond after taking the context switching into account and it is two higher priority tasks they take and this execution time means period and therefore, it is schedulable.
उच्च प्राथमिकता वाला टास्क (task) अधिकतम 3 बार और 27 + 12 * 3 = 63 <150 ms के रूप में आ सकता है और इसलिए, T2 शेडुलेबल (schedulable) है।