1. Write a Python script that prints how many species in FASTA format 
in a file called dna.fasta have the length of its sequence larger than
a number provided by the user. The input file may contain 
more than two sequences of any length. 

For example if the file contains 

>human
ACCGT
>mouse
GTGATAAA
>cat
GTGA


If the user provides 6

then the output of the program should be 

1

If the user provides 4

then the output of the program should be 

2


Your program should work for any sequences and not just the ones in the 
example.

2. Write a Python program that prints the species name of the longest
sequence in the file dna.txt given in FASTA format. 

For example if the file contains 

>human
ACCGT
>mouse
AGTTATATA
>cat
AGT
>dog
GTGTATA

then the output should be 

mouse

Your program should work for any number of sequences and not just the 
given example.

3. Write a Python script that takes from the user an input DNA 
sequence and prints "Yes" if it has the same number of As and Cs, and 
prints "No", otherwise. 

For example if the user types

AGGTGACCCT

then the output should be

No