Following on from your investigation into the suitability of different programming paradigms, the manager would like you to select one of these projects and develop a solution. Requirements for each project are given below.

$$ A bike rental system:

o allow users to select multiple bikes to rent

o allow users to select different bike sizes $($e$.$g$.$ adult and child$)$ and types $($e$.$g$.$ road, mountain, electric$)$

o calculate the cost of renting the bike$($s$)$ based on a standard rental cost of $15$JD per day and $50$JD deposit per bike

o output the total rental cost $($including deposit$).$

$$ A currency converter program:

o allow users to enter an amount in local currency $($Jordanian Dinar JOD $)$ and convert it to the following currencies $$ Euros, American Dollars, Japanese Yen and Turkish Lira

o the user should be able to alter the exchange rates used to match the current rates

o calculate the total amount for both currencies and add $3\%$ fee before outputting the total cost of converting.

$$ An exam grade calculator:

o allow users to enter name and exam marks for a group of pupils

o calculate the grade based on exam results:

$0-39$ Fail

$40-55$ Pass

$56-70$ Merit

$71$ and higher $-$ Distinction

o output the list of exam results against pupil names.