I Really Tried Project

I spent the passed 3 days trying to figure out how to add 3 buttons and get the knob to connect with each other. My Microbit calculations are all correct and set to they're own pins. But its confusing me how to set all the pins up to there own sound using the wires and how many resisters I need to place on the bread board. I know for one button You need one connected to the negative but with the other buttons, do they need there own individual ones? This tells me I need to work more on my wiring and need extra help.