Shear force and bending moment diagram

[Lowrie]

Homework Statement

I have an assignment that is similar to the following question. I believe if i am able to do this question i will be able to do the assignment. However I cannot seem to be able to get this question right. Below the question and answer.

[URL]http://img220.imageshack.us/f/image2hy.jpg/[/URL]
http://img220.imageshack.us/f/image2hy.jpg/

Homework Equations

I have to draw a FBD, SFD, and BMD of the following beam

The Attempt at a Solution

[URL]http://img233.imageshack.us/f/imagefw.jpg/[/URL]
http://img233.imageshack.us/f/imagefw.jpg/

 

[PhanthomJay]

You have a signage error in calculating Ay, which you should have realized; when summing forces in the vertical direction, Ay + By should equal the applied 4 kN force. When you sum moments about a point, and choose counterclockwise as plus, the clockwise moments get a minus sign in front of them.