Question$1(10$ points$)$

Given an arithmetic sequence of numbers, check whether the given number aligns with the sequence or not. The function takes four sequentially ordered numbers and searches for the query. Your task is to determine whether the query can be the next element of the sequence.

Contract

contract: isInSequence: n$1($number$)$ n$2($number$)$ n$3($number$)$ n$4($number$)$ query$($number$)$

$$ boolean

Examples

$($check$-$expect $($isInSequence $-18-23-28-33-53)$ #False$)$

$($check$-$expect $($isInSequence $-9-25-41-57-73)$ #True$)$

$($check$-$expect $($isInSequence $2-7-16-25-34)$ #True$)$

You can only use this list of function: