A:AnswerUsing the Thunderbolt (USB-C/DisplayPort) cable makes your MacBook recognize the monitor as a sound device. Select the monitor as your default output device and the built-in speakers will play your audio. This works for PCs with DisplayPort connections as well.
A:AnswerNot sure of the height but here is the link to download full manual from Samsung.
https://downloadcenter.samsung.com/content/UM/201906/20190618105350361/BN46-00559A-Eng.pdf