Reference Inlet Temperature Values in Ungrouped Macro Heat Exchanger Model

What values should be used for the Reference inlet temperatures in the ungrouped macro heat exchanger model?

1) The Reference Inlet temperature values are required to calculate the NTUs and effectiveness matrix for the heat exchanger for the heat rejection data table provided.
2) The Reference Inlet temperatures for the Auxiliary & Primary fluids are the inlet temperatures for both the fluids at which the experiment was performed to achieve the heat rejection data table.