Mavs Inc. wishes to determine its cost of common stock equity, rs. The market price, P0, of its common stock is $42.41 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?