Create a set of normalized relations given the patient bill below. Start with a single table (could be in NNF) and then proceed to 1NF, 2NF and 3NF. If the first table is in NNF, explain why it is NNF and the steps to take it to 1NF. Do not draw a dependency diagram for NNF; only the relational schema is needed. At each subsequent NF show the relational schema and the dependency diagram for each table. Write out the dependencies. State clearly any (reasonable) assumptions you may make. The bill is issued a few days (not a set number of days) after the discharge date. Each charged item belongs to a specific cost center. Each item belongs in a single cost center. All subtotals and the balance due are computed