Sketch the function represented by the given parametric equations. Then use the graph to determine the following.

a$.$ Determine the intervals, if any, on which the function is increasing and intervals, if any, on which the function is decreasing.

b$.$ Determine the number, if any, at which the function has a maximum and this maximum value, or the number, if any, at which the function has a minimum and this minimum value.

$x=7(t-sint),y=7(1-cost)$;$0t2$

Choose the correct graph of the function represented by the parametric equations.

A$.$ B$.$ C$.$ D$.$