an e-mail from the prof when i asked him to provide a more detailed solution. i forgot abt my block diagram cannot uh?! just asking for a better solution only... here's what i get! i told ya...the prof makes me feel dumb! eeek!

"The algebra of block-diagrams is explained in the course Control technique, which is a prerequisite for the course Introduction robotics. If you lack the knowledge on control techniques, then successful completion of Introduction robotics might be a challenge. As I have already advised you, it makes sense to consult study advisor whether Introduction robotics is appropriate choice for you."

can't i have a more encouraging mail from you? exams in less than 2 weeks and i'm going holidays still...seriously i need a wake up call!