A1 circuit		
				http://tinyurl.com/y8nvt2py

A1 Thevenin		
				http://tinyurl.com/ybdkebwz

B1 circuit
				http://tinyurl.com/ycop74zt

B1 Norton
				http://tinyurl.com/y8thlj9g

C3 circuit
				http://tinyurl.com/y73nhz8b