Your friend Nick is proficlent at programming. He desitened a charting and technical ahalysis soltware and claims that this soffware can help make significantly povitive abnormal returns. Assuming his claim is true anid the CAPM correctly predicts assef returns, which of the following statements is correct? Only weak form market efficiency is broken. Weak form, semi-strong form and strong form market efficiency are all broken. Stock prices fully reflect all known information. Changes in stock prices follow a random walk: Only weak form and semi-strong form market efficiency are broken