Answer the following problems in their entirety using Python. Code all questions in a single Jupyter notebook:

1. Using the equation of DNA melting temperature that we talked about in class, what is the melting temperature of the DNA sequence "GGACGCAGGGTGGAC"?

 2. What fraction of nucleotides in the sequence "GGACGCAGGGTGGAC" are C and G? (In other words, count the number of C and G and then divide by the sequence length).

 3. Transcribe the DNA sequence "TAACTTATTTAATC" to RNA. Assume that this sequence is the coding strand, so you need to only substitute "T" for "U".

 4. Compute the complement of the DNA sequence "TGACCCGTAAA". Assume that this sequence is written from the 5' to 3' direction and outputs the complement also in the 5' to 3' direction. (For instance, the reverse complement of "ATCG" is "CGAT").