Validation List with If statement

Hello, I have a validation list in columns E,F,I,L and M (No, Yes, N/A) I would like to put an if statement in columns F-M along with the validation list. So in F3 I would like to enter =if(E3="N/A","N/A"). Basically I would like if E2 = N/A than F2,I2,L2 and M2 are N/A. Any help would be appreciated. Thank you.