need helpw ith this pls thanks so much

*1 1 2 3 4 5 vi 4 8 5 12 13 Round your answers to two decimal places. Use Table 1 of Appendix B. a. Using the following equation: (1* - 5)2 E(x; - 5)2 Estimate the standard deviation of y* when x = 4. b. Using the following expression: Develop a 95% confidence interval for the expected value of y when x = 4. to c. Using the following equation: (1# - 1)2 Speed = SV1 + - n E(x; - 5)2 Estimate the standard deviation of an individual value of y when x = 4. d. Using the following expression: y* + a/25 pred Develop a 95% prediction interval for y when x = 4. If your answer is negative, enter minus (-) sign. toGiven are five observations for two variables, x and y. Xi 1 2 3 4 5 4 8 5 12 13 Round your answers to two decimal places. Use Table 1 of Appendix B