AUGUSTA — A Rhode Island man will spend at least 20 years in prison for breaking into an 84-year-old woman’s Sidney home, then attacking and injuring her son with a hammer when he arrived to help her. Dreaquan L. Foster, 23, of Providence, pleaded guilty Thursday at the Capital Judicial Center to charges related to the home invasion, even as he continued to claim that he had no memory of the break-in or attack but still apologized for it. Foster admitted to charges of elevated aggravated assault, aggravated criminal mischief, burglary, theft by unauthorized use of property and three charges of criminal mischief, all of which occurred March 12, 2017, at the home of Audrey Hewett.