velocity Questions

A particle moves towards east from a point $A$ to a point $B$ at the rate of $4\text{km/h}$ and then towards north from $B$ to $C$ at the rate of $5\text{km/h}.$ If $AB=12\text{km}$ and $BC=5\text{km},$ then its average speed for its journey from $A$ to $C$ and resultant average velocity direct from $A$ to $C$ are respectively