$4.$ What C$++$ data type would you use to represent the following data?Memory is important, so use the minimum possible amount of bytes.a$)$ The speed of an engine in rpmsb$)$ The age of a personc$)$ The state of a light bulbd$)$ The speed limit on a highway e$)$ The distance from a car to n obstacle in metersf$)$ The weight of the moon in tons,