(10 points) The following chart depicts the results of an event study of stock abnormal returns in a window of -30 to +30 days around LBO (Leveraged Buyout) announcements. a. (4 points) Are the results shown in the graph consistent with market efficiency? Explain what these results would suggest for each form of market efficiency. b. (2 points) What is an "abnormal" return? Explain in your own words. C. (4 points) A different study examined stock returns around LBO announcements and generated an event study plot showing an even larger average stock return on day 0 using absolute stock returns instead of abnormal returns. Explain the problem with these results. Cumulative abnormal stock returns 0.2 *** 0.15 0.1 0.05 -10 10 20 30 -0.05