подчеркните Participle I и Participle II и
установите функции каждого из них, т.е. укажите является ли оно определением,
обстоятельством или частью глагола-сказуемого.

        

         1) Logical operations performed by a computer are comparing, selecting,
sorting, and determining.

         2) The input unit consists of some
devices using different means.

         3) Discussing the advantages of the new
memory unit the professor gave the students all the necessary explanations.

         4) Having punched holes in a card the operator put it into
the computer.Помогите плиз