Mavs Inc. wishes to determine its cost of common stock equity, rs. The market price, P0, of its common stock is $44.57 per share. The firm expects to pay a dividend, D1, of $4.20 at the end of the coming year, 2021. The dividends paid on the outstanding stock over the past 6 years (20152020) were as follows: 2015 $3.60 2016 3.65 2017 3.70 2018 3.85 2019 4.00 2020 4.10 What is the cost of common stock equity financing?