What would do about this amount of equity and outstanding loans?

[Ouman You]

Hi guys,

I'm asking on behalf of someone I'll post their situation in numbers and tell me what's best for her please, and thank you.

Primary residence worth 3.7 mil has a no adjustable mortgage 162k at 3.5%

Multi family worth 3 mil and has 166k mortgage with 3.2% rate.

Line of credit 124k at 4.8%.

What would be her best option to consolidate all the loans under one mortgage at a lower interest. They are all currently with Chase, should they stick with them and refinance or look elsewhere for better rates?