Can y’all help me with the 3 questions still don’t wanna do it

Answer:
1- C Work the Exponents 12^2
2- A 120
3- (?) 31
Step-by-step explanation:
1- Pemdas
2- 12^2-48*1/2=?
First do the exponent 12^2=144
Then do the multiplication 48*1/2=24
Finally Subtract 144-24
3- 35-20/5
First divide 20/5 is 4
Then 35-4
This maybe wrong, but its what I got through pemdas.