16. Sennsanger Ltd is an Australian firm that has just announced a dividend that was much higher than what the market was expecting owing to a more profitable year than anticipated. The four key dates relating to this dividend were as follows: Dividend announcement date: 13 September Ex-dividend date: 20 September Dividend record date 22 September Dividend payment date 18 October Briefly (in no more than 10 lines in total) explain what each of these days represents and the predictable average stock price reaction that might be linked to each day