An airline allows passengers to carry different amounts of baggage, at no additional cost, depending on the class of ticket held by the passenger. There are three types of ticket: passengers who have first class tickets are allowed up to 45kg, those who have business class tickets are allowed up to 35kg and those who have economy class tickets are allowed up to 20kg.

The program below should set a variable excess_baggage to the amount (positive, zero or negative) by which a customer has exceeded their baggage allowance.

The program is incomplete at the points labelled a, b and c. Select the code (in textual form) that should be inserted at each of these points.

Code:

BUSINESS_ALLOWANCE [ticket_class]=[1] [ticket_class]=[2] [ticket_class]=[3] FIRST_ALLOWANCE [bag_weight]-[BUSINESS_ALLOWANCE] [bag_weight]-[FIRST_ALLOWANCE] [bag_weight]-[ECONOMY_ALLOWANCE] ECONOMY_ALLOWANCE

a = ?

b = ?

c = ?

when fickiced set FIR5T_ALLOWANCE * to 45 set BUSINES5_ALLOWANCE * to 35 set ECONOMY_ALLOWANCE 7 to 20 when space 7 key pressed ask Enter ticket class ( 1 for first; 2 for business; 3 for economy) and wait set ticket_class - to answer) set excess_baggage * to bag_weight) - FIRST_ALLoWAKcE