Suppose that y1(t,a,b) is a function of the three variables t,a, and b. y1 has been properly defined in the file y1.m which is in your current working directory. Likewise, y2(t) is a function of the single variable t that has been properly defined in the file y2.m, also in your current working directory. In a new script file, values are assigned to a and b and the plot of y1 and y2 versus t shown below is obtained: t A. Give the commands that you could put in the script file to determine the negative value of t for which y1(t,a,b) = 2. If additional functions need to be defined, indicate clearly how they would be named and the commands that they would contain. B. Give the commands that you could put in the script file to determine the area of the shaded region, bounded by the curve y1(t,a,b) and the curve y2(t) that is to the right of the maximum value of y1. If additional functions need to be defined, indicate clearly how they would be named and the commands that they would contain