Can anybody tell me the duration of gate pulse for this triac form its datashet?

Projects General Guidance
1

http://www.st.com/web/en/resource/technical/document/datasheet/CD00002267.pdf

link of data sheet given

please tell me the duration of

  1. gate pulse
  2. minimum and maximum gate current.
  3. minimum and maximum voltage this triac can handle
    the triac is bta-12

tell me whatever information you get out of the three.