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1. {8 pts.) The stock price for Valeant Pharmaceuticals International Inc. for the rst 15 weeks of 2015 can be approximated by f[x) = c.022x3 c.54x2 +101 (1:: x515) where x =1 corresponds to the beginning of week '1. {a} Find f'(.x:]. Clearly label the rst and second derivatives. {b} What is the sign of f'(x) on the given interval? Interpret the meaning in the context of the problem. {c} On what interval is x) concave up? Interpret the meaning in the context of the problem. Use one of the four descriptions given in the Coursepack Notes. {d} On what interval is x) concave down? Interpret the meaning in the context of the problem. Use one of the four descriptions given in the Coursepack Notes. {e} Find the location of the point of inection (inection point - IP}. lie, at what value of X does it occur?) Find the coordinates of the IP. Interpret the complete meaning of the inection point in the context of the