Need a bit of guidance in regards to this PNP transistor question
The voltage across R2 is going to be 6- Vbe if your transistor is working in linear region, where Vbe=~ 0.6v is the PN junction voltage to be overcome in order to make the transistor work. 

So the voltage across R2 is VR2 = 6-0.6= 5.4V

With this value you can apply the formula R2 = VR2/Ib and you´ll find the resistor value.