Can someone help me on this

Compute the following limit assuming lim f(x) =7. State the limit law(s) used to justify the computation. X- 3 lim [5f(x)] X-+3 Choose the correct answer below. O A. lim [5f(x)] = by power law of limit. x-3 (Simplify your answer.) O B. lim [5f(x)] = by constant multiple law of limit. x-+3 (Simplify your answer.)