Design of 2 simple circuits

Hi, Using the software CircuitMaker, I need 2 simple circuits designed to simulate: a) the 4-bit register with tri-state outputs 74LS173 and b) the 4-bit ALU 74LS181. Please use logic switches to input data and logic displays to show outputs. You should also use 4-bit data items and pathways. Also include labels so that I can fully understand how the circuit works, and so that I can investigate and study it further. I was able to find some information about them both by searching the internet: a) [login to view URL] and b) [login to view URL] You may choose to base your circuits from the information in those documents, or you can do your own research.