Construct a simulink model that solves r=√a^2+b^2. Find the values of r if a=12 and b=15. Outline the steps involved in performing the procedure to develop the simulink model.​

Description: write function lastfirst() that takes one argument—a list of strings of the format "lastname, firstname" —and returns a list consisting of two lists: (a) a list of all the last names (b) a list of all the first names