When my teacher goes over it in class it makes sense... but I just have no idea how to start either of these problems

The first one they want us to find the Norton equivalent... so what I did first was short circuit the voltage source and the Vab and I assumed Vab=24v since thats the potential difference from top to bottom

Then afer that I saw that the current goes through the short circuit then the 12 ohm resistor (but omits the 6 ohm), therefore, the current was 24/12=2 amps

Idk if thats right or not.. but thats how I approached it

for problem #2, I didn't know where to start since my teacher only taught us how to deal with independent sources.. I just assumed you can change the current source to an independent voltage source with voltage 100I*50k with a 50k resistor in series with that..

I would REALLY appreciate any help! thank you