Определите по грамматическим признакам, какую функцию выполняет окончание – ‘ed’ в следующих предложениях, т. е. служит ли оно: а) показателем стандартного глагола в Past Indefinite; б) показателем Participle II от стандартного глагола в функции

Определите по грамматическим признакам, какую функцию выполняет окончание – ‘ed’, т. е. служит ли оно:
а) показателем стандартного глагола в Past Indefinite;
б) показателем Participle II от стандартного глагола в функции определения к существительному;
в) частью сказуемого от стандартного глагола в Passive Voice or Perfect Tense;
г) устоявшимся прилагательным.
1. B. Franklin is acknowledged to have invented a means of protecting against the disastrous effects of lightning – the lightning rod. 2. After many difficulties he at last managed to enter the university. 3. This design was to be worked out by a highly qualified engineer. 4. The American Constitution was finally adopted in 1788. 5. The loosely organized colonies needed a single military commander to unify their forces. 6. An organization’s information management requirements are determined by some factors: two general factors are the environment and size of the organization, and two specific factors are the area and level of the organization. 7. He was a very talented mathematician.