# 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[String, Address] = {
    Try(getStreet1) match {
        case Success(s1) =>
            val s2 = Try(getStreet2).toOption
            val s3 = Try(getStreet3).toOption
            Success(Address(s1, s2, s3))
        case err =>
            err
    }
}



// =======================================================================  
// 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
}