Q3.

(20 points) Consider a generic 3-node triangle, numbered according to the figure in the

class notes. Write a series of subroutines in a program language of your choice (Matlab,

Python, C, ...) that does the following. Note: these routines may be very short. You

should provide comments and also use names for variables that are suggestive, i.e. use

good programming habits.

(iv) Verify via hand calculations (i.e. the final formula for B in terms of x,y given in

class) that your B matrix is correct.