To construct a trapezium ABCD with AB∥CD, AB = 6.5 cm, BC = 6.2 cm, ∠ABC=80∘ and ∠DAB=105∘, we follow the following steps:
1) Draw the line segment AB = 6.5 cm.
2) Construct the angle ∠ABX=80∘ at B.
3) With B as centre, draw an arc of radius 6.2 cm cutting BX at C.
4) Draw CD parallel to AB.
The next step involved in the construction is __.