While MATLAB is great with linear algebra and large matrices of data, MATLAB can also handle working with what we call 'symbolic' math. Symbolic math means that you don't have to define all the variables with number values upfront. You can use the syms to declare a variable as 'symbolic', and have it's variable name carry through the calculations. >> syms a >> X = a + 1 a + 1 Exercise 4 Using MATLAB, you can even solve determinant questions where there is a variable in the matrix, try copy-pasting the following code into your Command Window, to create a matrix M with a variable a. syms a M = [7 1 3 -2;-21 -12 -1; 1 16 -4 a; 2 4 2 2] Now, find the determinant of M, and copy-paste the output below: What number needs to replace a, for det(M) to equal 2012? Briefly, explain what syms does