Water damage caused by homeowner responsibility
I have the following problem. I am a tenant of an apartment. I have sublet it with the permission of the landlord (subletting permission). Now, a disused water pipe in the building has burst. The water has flooded into my apartment, making it uninhabitable. My tenant (the subtenant) had to move to a hotel, which I initially paid for 2 nights. He now has to find another apartment. I do not have home insurance, and the subtenant does not either. It is undisputed that the water damage falls under the responsibility of the landlord.
Now to my questions:
1.) Who will pay for the damages to my furniture (water damage)??
2.) Who will pay for the damages to the subtenant's soiled clothing and laptop??
3.) Who will pay for the subtenant's hotel stay??
4.) Can I reduce the rent by 100% until the apartment is habitable again (which will take about three months)??
5.) Can loss of earnings also be claimed against the landlord?? (I operate the rentals as a business) Three rents are missing, which the subtenant no longer pays.