This is the tutorial for ass4 2019. You are provided a file called ass4_shell_2019.m that contains most of the MatLab code for this assignment. YES you should read it and use any variables you need in your program. This program has code that reads the climate data for you. Average, sum of maximum of rain and snow (scale by 0.1) and maximum precipitation are computed for you. You have 2 tasks (questions) for this assignment: (1) Compute a graph for each month showing errorbars for the monthly average precipitation values. The minimum and maximum error bars are the sum of the maximum of rain and snow (scale by 0.1) and the maximum precipitation for each year. Use errorbar(X,Y,L,R) where X is an array of the years, Y is an array of the average monthly precipitation, L is the sum of the maximum of the rain and snow (multiply by 0.1) values minimum monthly temperature and R is the maximum monthly precipitation value. Theoretically L and R should be equal but often are not. (2) Compute the curves of various orders to show how average precipitation has changed over time (1941-2013). Use polyfit and polyval to plot these curves for orders 1 (linear), 2 (quadratic), 3 (cubic), 4 (quartic) and 5 (quintic). Use the color schemes on the assignment handout for your graphs. Your program should produce the same graphs on the assignment handout (there are 4 graphs there) plus another 20 graphs. Do NOT pass in the graphs, rather just pass in one file, ass4_2019.m.Running this code should produce the 24 required graphs. There are 2 comments in ass4_shell_2019.m, replace them with the code to produce the graphs.