/// <summary>
/// constructor
/// </summary>
/// <param name="handler"> object class HandlerCars </param>
public AmountOfCars(HandlerCars handler)
{
this.handlercars = handler;
}
/// <summary>
/// constructor
/// </summary>
/// <param name="handler"></param>
public AveragePriceOfCar(HandlerCars handler)
{
this.handlercars = handler;
}
/// <summary>
/// constructor
/// </summary>
/// <param name="handler"> object </param>
public TypesOfAllBrands(HandlerCars handler)
{
this.handlercars = handler;
}
