HELPMME PLZ blah blah

Let r be a robotic arm with a fixed base and seven links. the last joint of r is a prismatic joint, the other ones are revolute joints. give a set of parameters that determines a placement of r. what is the dimension of the configuration space resulting from your choice of parameters?

The first screen you see when you open word2016 what is called?

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables