Sorry for my bad English. First I'm new here so hello everyone. I need fast help! I got this construction task:

Make a construction of triangle ABC if you have

height on side "a"
gravity on side "a"
symetral of angle alfa

It's like on this picture:

I hope you can help me if you understood me. Further thanks to all of you


p.s. I need this fast, until 13:00 hours (on european time gmt +1)