Low pressure/flow in one bathroom sink and shower?

I live in a 3-story condo. One of the 2 sinks in the master bathroom, the one closer to the tub/shower, has really low water pressure and/or flow. It doesn’t change when I just turn the cold on, or the hot on, or both. The other sink works fine. In addition, the tub faucet and shower head have low water pressure/flow, too. The water bill is included in the HOA fees.

What could be the most likely problem/s?

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