Thevenin Equivalence: Is my workings correct?

[JohnGaltis]

Homework Statement

https://imgur.com/a/XySpV (If above image can't be seen.)

Homework Equations

KCL/KCL
Rth=Vth/I

The Attempt at a Solution

Included in Screenshot.

What I did was Open-Circuited the Load and use Nodal Analysis to find V_oc

Then, I shortcircuited the Load to find I_sc.

Then I use I_sc and V_oc to find R_th

 

[gneill]

Your results look good so far. What did you find for the maximum power?