a) Three file organisation methods and two file access methods are shown below. Copy the diagram below and connect each file organisation method to its appropriate file access method(s).

b) An energy company supplies electricity to a large number of customers. Each customer has a meter that records the amount of electricity used. Customers submit meter readings using their online account.
The company’s computer system stores data about its customers.
This data includes:
– Account number
– Personal data (name, address, telephone number)
– Meter readings
– Username and encrypted password.
The computer system uses three files:

For each of the files A, B and C, state an appropriate file organisation method for the use given in the table.
All three file organisation methods must be different.
Justify your choice.

File organisation File access method method random sequential serial direct sequential