# Question

Implement the function `retrieveAddress` using the methods `getStreet1`, `getStreet2`, and `getStreet3` to create an `Address`.

case class Address(
  street1: String,
  street2: Option[String],
  street3: Option[String]
)


def retrieveAddress: Either[Throwable, Address] = {
    Try(getStreet1).toEither {
        case Some(street1) => 
            val street2 = Try(getStreet2).toOption
            val street3 = Try(getStreet3).toOption
            Address(street1, street2, street3)
        case Left(throwable) => Left(throwable)
    }
}



// =======================================================================  
// LIBRARY METHODS 
// =======================================================================

/**
  * Retrieves the main street address.
  * @throws RuntimeException if empty
  */
def getStreet1: String = {
  // implementation
  
}

/**
  * Retrieves additional street address line 2.
  * @throws RuntimeException if empty
  */
def getStreet2: String = {
  // implementation
}

/**
  * Retrieves additional street address line 3.
  * @throws RuntimeException if empty
  */
def getStreet3: String = {
  // implementation
}