I purchased an Early 2015 Macbook Pro. I have nothing installed on it that needs to be saved. Being new to using an Apple product, I failed at attempting to setup dual boot with Win10. Now I am stuck with what looks like a messed up SSD. I tried to return it to a single 250GB partition and ended up with a mess. Disk Utility shows Container disk3 with MacOS 152GB, Container disk1 8GB and Container disk2 90.79GB. How do I get this back to normal ?