1. The problem statement, all variables and given/known data 2. Relevant equations KVL 3. The attempt at a solution Using KVL around BE loop 0-0.6-i_e*(30*10^3)-15=0 i_e=-0.52mA However, I stuck when I tried to find i_c and use KVL around CE loop/ CB loop For CE loop: 10-i_c*(15*10^3)-Vce-i_e*(30*10^3)-15=0 For CB loop: 10-i_c*(15*10^3)-Vcb=0 I got confused about how to relate Vce and Vcb. (here I guess it must be some kind of relationship that looks like Vbc-Vac=Vba) Also, it seems like it is operating in cutoff mode (both Vc and Ve>Vb), however, there is current flowing around the loop. So what is the mode that the transistor is actually operating in? Thank you!