need help with these 2 please

Financial theory holds that the goal of a firm is to maximize shareholders' wealth; which of the following make this assumption questionable? Both, industry concentration and lack of meaningful regulation Lack of meaningful regulation Industry concentration into a few firms O Instability caused to by volatile stock market At 7% compounded monthly, how many years will it take for $1,000 to triple? Round your answer to the nearest year. 10 years 9 years 16 years 189 years