Your task. Write a Matlab function that computes the linear spline interpolation for a given data set. You might need to take a look at the file cspline eval.m in Section 3.4 for some hints. Name your Matlab function lspline. This can be defined in the file lspline.m, which should begin with: function ls-1spline(t,y,x) % Ispline computes the linear spline % Inputs: t: vector, contains the knots y: vector, contains the interpolating values at knots 2x: vector, contains points where the lspline function should be evaluated and plotted % Output: % is: vector, contains the values of Ispline at points x Use your Matlab function lspline on the given data set in Problem 2, plot the linear spline for the interval [1.2,2.2 What to hand in: Hand in the Matlab file lspline.m, and your plots