Plot the waveform of clipper circuit

[DODGEVIPER13]

Homework Statement

Plot the output voltage V0 versus time of the circuit below. Assume Vgamma=0 for the diode. Clearly mark the values on the plot for full credit

Homework Equations

KVL
KCL

The Attempt at a Solution

I have uploaded mt attempt the dotted line is the input waveform and the sold line is output Vb=5V and Vi=10V. So I guess what my question is do I have it labeled correctly I know at the top it is Vi+Vb but why? Also what would the equation for the bottom be and where does the solid line stop at -5 like I have it.

 

[berkeman]

If you could post higher resolution pics, that would be a help (rightside-up would also be a help). And what is Vgamma?