Compare and contrast the financial health of a Papa Johns vs California Pizza Kitchen. Your evaluation should include an in-depth financial statement analysis using data from the past five years. Altman's Z-score calculation for at least three years and an in-depth analysis of the company's probability of bankruptcy.

I need help with how one finds the Altman's Z-score calculation and what information from the past 5 years would i need to have to do the calculations. Thank you!