Which of the following statements a$),$ b$)$ or c$)$ about the Jupyter Notebook is false?

The unit of work in a notebook is a cell in which you can enter code snippets.

To execute the current cell's code, type Ctrl $+$ Enter $($or control $+$ Enter$).$ JupyterLab executes the code in IPython, then displays the results below the cell.

By default, a new notebook contains one cell, but you can add more.

All of the above statements are true.