Question $6$:

Figure $1$ below is the record format for the electricity consumption database. For

simplicity, monetary values here have been represented as double, while the

account number, customer name and tariff type are in UTF format:

Figure $1$

For electricity tariff types, the following value rates are used:

You are given the following data $($Figure $2)$:

Figure $2$

and the following class $($Figure $3)$:

Figure $3$

Write a main$()$ method that performs the following tasks:

a$.$ Create a ElectricCharge array that contains the data in Figure $2.$

b$.$ Writes using DataOutputStream the contents of that ElectricCharge array to a

file called charges.dat according to the record format in Figure $1.$

c$.$ Reads back using DatalnputStream the stored ElectricCharge contents in

charges.dat and writes them to the screen as shown in Figure $4.$

Figure $4$

The main$()$ method should declare that it throws IOException.