Given are five observations for two variables, a and y. Use Table 2 of Appendix B. 1 2 3 4 5 Vi 3 7 6 12 13 Round your answers to two decimal places. a. Using the following equation: + Estimate the standard deviation of y * when * = 3 b. Using the following expression: Develop a 95% confidence interval for the expected value of y when * = 3. to c. Using the following equation: Speed = 5 1 + Estimate the standard deviation of an individual value of y when z = 3. d. Using the following expression: Develop a 95% prediction interval for y when = = 3. to