Determine what voltage brings \$ V_{in} \$ in the saturation region for the following circuit?
Examine the following equation:


Vin = 33 x 103 * 0,216x20-3 + 0,2


Why did you add 0,2?  Isn't Q1 a silicon transistor?  What's a typical VBE drop for a silicon diode?  

Hint:  It's ~0,7.