Explain how you got the electronic configuration for zinc (1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2). pls finish my explanation, I have to explain it as if I'm a teacher

what I have written:

The atomic number is equal to the electron number, which is 30. The s shell is equal to 2 electrons, the p shell is equal to 6 electrons, and the d shell is equal to 10 electrons. So when we add the shells together should be equal to 30. We should follow the electronic configuration chart (like this https://antranik.org/wp-content/uploads/2011/10/shells-orbital-electron-configuration.jpg)