Please give a full proper answer!!!!! Please!!!!!! :(

Q1:

Two samples of water are at different temperatures. A 2 L sample is at 40°C, while a 1 L sample is at 70°C (Show ALL work and Units).

Please someone actually help, my last question is the same with 60 pts and wasn't answered. Please give proper answers. :(

Q2:

The particles of which sample have a larger average kinetic energy (Show ALL work and Units)?


Q3: The water samples are mixed. Assuming no heat loss, what will be the temperature of the 3 L of water (Show ALL work and Units)?