How do I do ownership refinance

[Leobardo Rodriguez]

I started listening to Bigger Pockets not that long ago and been learning little things here and there. Okay my mom owns a house with her brother, sister, and a sister-in-law (One of my uncles passed). So four owners in total 2 want to sell the house and 2 don't want to sell. I was wondering if there is a way they can buy out the other 2 who want to sell their share of the property. I was thinking since the house (400k) is paid off can they refinance the house to get their share of the property money the 2 who want to sell pull their money out. Then the 2 who want to keep the house but there's a share of the people wanting out for 100k so it becomes two owners so the house is now under joint tenancy. How would the process work?