Four Bar Linkage Mechanism - Space Diargram

[AutumnBeds]

Homework Statement

A four bar chain is arranged as the diagram shown below If the input link AB rotates at 400 RPM anti CW determine the angular velocity of link DC

Homework Equations

See attached photo

The Attempt at a Solution

See attached photo

 

[haruspex]

The links don't work for me.
Anyway, apart from diagrams, the attempted solution should be typed in. It is often hard to read images of algebra and it makes it difficult to comment on specific expressions.

 

[Dr.D]

I don't see any images at all.