Without using a programming language please solve the question. I would like to understand the math behind the question and the work being shown would help a lot.

Question 6 Let W be a 33 window centered about the pixel (1,1) (coordinates start with 0). Let the gradient vectors in this window (top to bottom, left to right) be {(0,1),(0,1),(0,1),(1,0),(1,0),(1,0),(0,0),(0,0),(0,0)}. To localize a corner in this window you need to multiply the inverse of the correlation matrix C by a 21 vector Q. Compute the vector Q and add its entries to form your