I need help with these three practice problems please answer them all correctly and ill gladly leave a thumbs up thank you!

What are the annual holding period retums over the three full years(2005-2006, 2006-2007 and 2007-2008)? Assume each stock price given is for January 1 of the year indicated. 10.0%,7.27%, and 5.88% 5.0%,4.36%, and 5.88% 10.0%,2.0%, and 4.32% none of the above Annualized returns: you are offered a three (3) month investment that will pay you 6.86%. What is return equivalent to on an annual basis? 27.4% 30.0% 30.4% 38.15% What is the sample variance and standard deviation for the following returns? Hint: use the var.s and stdev.s Excel functions. Period 1: 11.1\% Period 2: 15.9\% Period 3:-22.6\% Period 4: 0.1% Variance: 2.9% Standard Deviation: 17,1\% Variance: 17.1\% Standard Deviation: 2.9\% None of the above