$1.$ Write the following member functions for the class arrayListType. The class definition for arrayListType is in the notes, the book, and in this Module.

a$.$ int sum $()-$ returns the sum of all the elements in the list.

b$.$ double average$()-$ calculates and returns the average of the elements in the list.

c$.$ int higherThan$($int$)-$ returns the first number in the list that is greater than the argument passed to the function. If it does not find a number greater than the argument, then it prints a message and returns $-1000.$

d$.$ bool firstIsLast$()$ returns true if the first number in the list is the same as the last number in the list.

e$.$ void add$6()$ adds $6$ to each number in the list. The function does not print anything, return anything. It just adds $6$ to each number in the list.

Remember these are all member functions of the class arrayListType.j#list: int

#length: int

#maxSize: int

$+$isEmpty $()$ const: bool

$+$isFu$11()$ const: bool

$+1$istsize$()$ const: int

tmaxListSize$()$ const: int

$+$print$()$ const: void

$+$isItemAtEqual $($int$,$ int$)$ const: bool

$+$insertat $($int$,$ int$)=0$: void

$+$insertEnd $($int$)=0$ : void

$+$removeAt $($int$)$ : void

$+$retrieveAt $($int$,$ ints$)$ const: void

$+$replaceAt $($int$,$ int$)=0$: void

$+$clearList $()$ : void

$+$seqsearch $($int$)$ const $=0$ : int

remove $($int$)=0$: void

$+$arrayListType $($int $=100$

$+$arrayListType $($conat arrayListType s$)$

arrayListType $()$