b) Determine the number of consecutive integer numbers which when added together will give a value equal to or just less than 210 (i) Give MATLAB commands to plot, on the same figure, the two functions: f=31²+21-0.5 g= 21 cos(1) Where the variable t varies from 0 to 10 with step 0.5 - Draw the function f in blue 0 and the function g in red* - Give title to your graph and label the axes. c) Write a user-defined MATLAB function for the following math function: Z(x, y) e' cos y+sin(x²-y) (EV:7) The input to the function are x and y, the output is Z. write the function such that x can be a vector. (i) Use the function to calculate Z (-3, 4) and Z (5,7). (ii) Use the function to make a 3D plot of the function Z(x, y) for - ≤x≤ and-sy≤ (CR:10)