$7.(18$ pts$)$ A "handbook" of technical indicators contains many popular formulas that can be used for stock trading,

such as moving average crossovers, put$/$call ratios, and trin statistics. For each, it provides an example of a

particular time period and a particular stock where that technical strategy would have provided good returns.

a$)$ Do you think this handbook provides useful information for investors? Briefly explain why or why not.

b$)$ Does this handbook's evidence contradict the efficient markets hypothesis? Briefly explain why or why not.