Chapter 3 Question 29 [Attaway, M. (2019), MATLAB: A Practical Introduction to Programming and Problem Solving, Fifth edition]

The question 36 is :

I simply don't understand what is asked to do.. Thanks

29. A calorie is a unit of energy. The 15C calorie is defined as 4.1855 Joules. The following script defines a couple of random calorie values, calls a function to calculate the equivalent number of Joules, and prints this. Write the function and store it in a separate code file. call = randi ( [10 2e3]); inj1 = cal2J (call); cal2 = rand*100; inj2 = cal2J (cal2); fprintf('%d calories is %.2fJ ',cali, inji) fprintf('%.1f calories is %.2fJ ', cal2, inj2) 36. Modify Problem 29 to use a local function