$($b$)$ The national road Toll Company publish their tariffs for their

automatic tolling system around the country. The toll charge is

based on the vehicle type and the distance covered. There are

two types of vehicles that use the toll: motor cars and goods

vehicles. The distance categories are Short$-$hop $($between $1$ and

$150km),$ Long$-$journey $($from $401km$ to $500km),$ and Middle$-$

Distance in$-$between. The total length of the toll road is $500Km.$

The tolls are charged on the following basis:

Motor Cars pay $1$ for short$-$hop journeys, $2$ for middle$-$distance

journeys, and $3$ for long journeys.

Goods vehicles pay $7$ for short$-$hop joumeys, $9$ for middle$-$

distance journeys, and $10$ for long journeys.

A computer program is to be written to $($a$)$ calculate and output

the toll cost. The program inputs are the enumerated values of

vehicleType motor$\_$cars, goods$\_$vehicle$\}$ and the journey

length as an integer.

It is assumed that the minimum journey length will be at least

$1km$ once they vehicle enters the toll road. The maximum

possible journey length is $500km.$ Any journey lengths outside

the values are treated as error inputs and the program returns a

value of $-1.$

Using the fault model of Boundary Value Analysis write out the

Test Coverage Items and the Test cases, producing a table that

shows the Test Coverage Items covered by each test.