$$ State the four principles of rational workplace layout $(8$ marks$)$

$$ In anthropometry, a constraint is an observable, preferably measurable characteristic of human beings which has consequences for the design of a particular artifact.

a$.$ What is a one$-$way constraint $(5$ marks$)$

b$.$ What is a two$-$way constraint $(5$ marks$)$

c$.$ Describe the four cardinal constraints and state if they are one$-$way or two$-$way constraints. $(8$ marks$)$

Note: Use examples and$/$or sketches to illustrate your answer.