Could you help me with this question

1. Calculate the total heat transfer (q), from both the hot water to the cold water, as well as the cold water to the hot water, using q=mC(T2-T1), in kJ/sec

2. Calculate Logartihium Mean Temperature difference, Tm

3. Calculate the overall heat transfer coefficient of the heat exchanger with using q=UA(Tm)

4. Calculate heat transfer effectiveness

I'll attach the data.

Hot water flow rate: 12gal/min

Cole water flow rate: 4gal/min