Can a body have uniform velocity but non-uniform speed ?

Can a body have uniform speed but non-uniform velocity ?

Can a body moving with uniform velocity have non-uniform speed?

Can a particle, moving with a uniform velocity have a non-uniform speed?

When a body moves with uniform velocity then

Can a body have a constant velocity but a varying speed?

Can a body have a constant velocity but varying speed?

Can a body have a constant velocity but a varying speed ?

Can a body have a constant velocity but a varying speed?

State the nature of the graphs representing motions of a body with uniform velocity, with uniform acceleration and with uniform retardation respectively in a dispalcement - time graph.