Modify the heat transfer program so that the boundary values for each quadrant are updated once for every hundred computational iterations. Look in the code for the comment ! Update interior quadrant...

Modify the heat transfer program so that the boundary values for each quadrant

are updated once for every hundred computational iterations. Look in the code for

the comment

! Update interior quadrant boundaries

and do the update and synchronization only if the value of niter is a multiple of

100. Does the four-image computation run faster? Why are the computational results slightly different?