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Its number 1.

Explanation:

Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.

It’s both I and II

Explanation:

Speed refers to how fast something goes by using the equation distance/time. So it only uses distance and time.

On the other hand velocity is basically speed, so it uses distance/time, but the only difference is velocity uses direction.

anchor = archer //

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.