Investigate what value of n between 1 and an input value (such as 100,000) gives the longest sequence, and how long that sequence is. Write a function in Python named biggest_seq(end), where end is the largest integer input. This function will evaluate different values of n, where the starting value of n should be 1 and the final value is equal to the end variable.

The aim of this function is to identify what value of n gives the longest collatz sequence. For testing, you should use your own collatz function, but for the submission, you can assume there is a fully working collatz(n) function already present.

You should return 2 variables, the sequence number and the sequence length.