He would draw a picture in the competition.

In the competition he would have to draw a picture

A picture in the competition would have been drawn by him

In the competition he would be drawn a picture

A picture would be drawn by him in the competition

All of the above

Active Voice: He would draw a picture in the competition.

Passive Voice: A picture would be drawn by him in the competition

Given sentence is in simple future tense and it is in active voice.

Rule :
Subject + (will/shall/would) + be + V3 + Other agents.

Draw is a verb.

Drew is the second form while withdrawn is the third form of Drawn.