Answer: The direction he is facing now is Southwest.
Explanation: To determine Mihir's direction after taking multiple turns, we need to add or subtract the degrees of each turn from his original direction (south east).
Starting direction: South East (SE)
135 degree right turn: SE + 135 = Southeast-East (SE-E)
45 degree right turn: SE-E + 45 = East (E)
90 degree left turn: E - 90 = North (N)
225 degree left turn: N - 225 = Southwest (SW)
So, after taking all four turns, Mihir is now facing Southwest.