Make multiple fields required in form before save

Hi, I am trying to make multiple feild in a form required before the form can be save and sent back to me as an attachment. I am very new to this much of a detailed formula, any help would be greatly appriciated.

The cells that I need to have required are E3, M3, R3, W3, E6, V6, E7, V7, V8, and E9

Please help

Thank you very much