nts eBook Print References Sony is a world leader in the manufacture of consumer and commercial electronics as well as in the entertainment and insurance industries. Its ROA has decreased over the last three years. Required: Indicate the most likely effect of each of the changes in business strategy on Sony's ROA for the next period and future periods (+ for increase, - for decrease, and NE for no effect), assuming all other things are unchanged. Treat each item independently. a. Sony decreases its investment in research and development aimed at products to be brought to market in more than one year. b. Sony begins a new advertising campaign for a movie to be released during the next year. Strategy Change Current Period ROA Future Pariods' ROA b