Answer:
Pre-tax = 17.62%
After tax = 12.60%
Step-by-step explanation:
The pre-tax return is determined by the difference from selling and purchase price, added to received dividends, and then divided by the purchase price:

For the after-tax return rate, correspondent dividend and long-term capital gains taxes should be considered:
![R_(AT) = ([(117-101)*(1-0.30)]+[1.80*(1-0.15)])/(101)\\R_(AT) =0.1260=12.60\%](https://img.qammunity.org/2021/formulas/business/college/7s0qf9xnns1bho73f4k0iw9djpufpsuhcl.png)