level shifter

I'm designing a project which involves a microcontroller sending data over SPI to two SN74HC595N shift registers which, then control some level shifters to turn on and off some 12v end devices. (The MC and the register circuit are on two separate boards) I want to power the shift registers and...

The contents of a 8-bit register is initially 01110111. The register is shifted right six times with the serial input being 011001. The same register is then shifted left 4 times with the serial input being 0101. What is the final contents of the register?

Voltage Source V2 is managed between 0 and 5V,So how does the voltage vary at point 4 or across the 3 ohm resistor