The second most commonly thought of as a possible mother was Persephone. One of the smallest fractions of people believe mother was never in any of the movies. Father could have been irritated with neo's stupidity, bothering to ask who mother is.
You can protect cells (or whole rows or columns) by highlighting the cells (i.e. data input cells) you DON'T want to protect then click on Format->Cells->Protection tab. Uncheck the Locked box. Now protect your worksheet and/or workbooks with a password.
You can set Excel to freeze rows and columns so that they are always visible. To do this, you'll want to select the cell in the corner of the area you want to keep unlocked. For example, if you want to keep the top row and the first column locked on the screen, highlight cell B2.