Can the instantaneous velocity of an object during a time interval ever be greater in magnitude than average velocity over the entire interval?Can it be less?

Can you measure the average speed and average velocity ?

If the average velocity of an object is zero some time interval,What can you say about the displacement of the object for that interval?

Is it possible that the average velocity for some interval may be zero although the average velocity for a shorter interval included in the first interval is not zero?

Explain clearly, with examples, the distinction between : (a) magnitude of displacement (sometimes called distance) over an interval of time, and the total length of path covered by a particle over the same interval, (b) magnitude of average velocity over an interval of time, and the average speed over the same interval. [Average speed of a particle over an interval of time is defined as the total path length divided by the time interval]. Show in both (a) and (b) that the second quantity is either greater than or equal to the first. When is the equality sign true ? [For simplicity, consider one-dimensional motion only].