Matlab question

Given the following data: x -1 1 2 3 5 Estimate the value of y atx 2.5 using an interpolating polynomial that goes through all the data points: . a spline interpolation: Note: to receive credit for your answers, you must give your answers to 4 decimal places (use the default settings for MATLAB, i.e., format s hort, which gives answers to 4 decimal places e.g., do not have MATLAB display more than 4 decimal places and then round your answer)