Please show work and explain how you got to the answer thank you

Find the second derivative of f (:6) = 3 sin (49:). Enclose arguments of functions in parentheses. For example, sin (23). ab % |a| 7r sin(a.) llll 0 f\" (m) =5: Please explain, in your own words and in a few sentences, how you arrived at your answers. Answers with no relevant explanations may receive reduced or no credit