Answer: CE IS 2.5 UNITS
BD=7 units
DE=2 units
AE=4 units
BE=BD-DE=7-2=5 units
By the intersecting chord theorem (when two chords intersect each other inside a circle then the products of their segments are equal )
5/4=x/2
5*2/4=x
10/4=x
2.5=x
CE is 2.5 units