According to the text it is correct to say about the verbs: “began” (line 10), “invented” (line 17), “made” (line 21), “enabled” (line 32), and “showed”(line 34).

01) They are all in the simple past.

02) Three of these verbs are regular, and two are irregular.

04) The translation of the base form of these verbs is, respectively: começar, inventar, fazer, possibilitar and mostrar.

08) The base forms of these verbs are, respectively: begin, invent, made, enable, and show.

16) The “ed” rule to form the past tense in “invented”, “enabled” and “showed” is the same.