$1.$a The following question concerns the $C$ language.

i$.$ The $C$ programming language supports the use of functions. Provide $3$ benefits that arise from structuring your programs using functions.

$[3$ Marks$]$

ii$.$ Functions can return a range of different types. Provide one example of a valid return type and one example of an invalid return type.

$[2$ Marks$]$

$1.$b For each of the following statements about functions in C$,$ briefly state whether they are true or false and provide a brief explanation or clarification as appropriate:

i$.$ Functions can return multiple values.

ii$.$ C passes parameters by reference.

iii. Inside your main $()$ function you can always access variables declared inside any other functions in the program.

iv$.$ If you do not declare a return type for a function it will default to void.

v$.$ Both int main$()$ and int main$($int argc, char $*$argv$[])$ are valid headers for the main function.

$[5$ Marks$]$