CSIR UGC NET Physical Science June 2019 transistor Problem problem

The question goes like this:

An NPN transistor is connected in a voltage divider configuration as shown in the figure below…. if the resistor R2 is disconnected the voltage Vb at the base and Vc at the collector change as follows…

Solution is below

The Slide PDF can be found here :

Csr ugc net phy june19 physics q(19 of 55) solution from bkacademy