The surface area would be 166.
Hint to start out the problem:
eg. For f(4), use the first expression, (x-3)^2 because 4 is greater than 1.
Answer: 
Step-by-step explanation:
to find the slope use the formula 
in this case, the line goes up 1 unit and to the right two
this means the slope is :
⇒ 
The answer is choice B 70 square units. There is 7 which is the length and 10 which is the width so you multiply 7 × 10 = 70 Square units that is the final answer.