please help me with these 3 photos for each question are po

please help me with these 3 . photos for each question are posted below. thanks.

a) kvl=> V= 25+45+30 =100V

b) 36= 9+V2+16 => V2= 11V

c) if R1,R2 in series have overall voltage is 15V and drop at R1 is 5V then drop at R2 will be 15-5=10V