PYTHON

flightCursor $=$ reservationConnection.cursor$()$

flightQuery $=($Select FlightNumber, DepartureTime FROM Flight $$

$$ WHERE AirportCode $=\%$s AND AirlineName $=\%$s$)$

flightData $=($PEK$,$China Airlines$)$

flightCursor.execute$($flightQuery$,$ flightData$)$

for row in flightCursor.fetchall$()$:

print$($Flight$,$ row$[0],$departs at$,$ row$[1])$

flightCursor.close$()$

flightQuery $=(\text{'}$SELECT AirlineName, DepartureTime, AirportCode FROM Flight $\text{'}$ WHERE FlightNumber $=\%$s$\text{'})$

flightData $=(140,)$ # Comma required for single value tuple

flightCursor.execute $($flightQuery$,$ flightData$)$

row $=$ flightCursor.A$()$

if row is B :

print $("$Flight not found"$)$

else:

print $("$Flight$\text{'},$ row$[0],$ 'departs from', C$)$

flightCursor.close$()$

Questions:

$1.$ What is identifier A$?$

$2.$ What is identifier B$?$

$3.$ What is identifier C$?$