2. (4 points) Write a MATLAB program (a2q2.m) that begins by defining vectors a and b as follows: 7 a=21, 18, 15, 12, 9, 6 and b = 7, 7 7 7 7 4' 7' 10' 13' 16 Use shorthand notation. Do not output the values in a and b. Then, use the vectors in element-by-element calculations to construct and output a vector c as follows: C = 1 1 ab ba (a + b) Finally, compute and output the mean of the values in c.