What is the standard Gibbs free energy for the transformation of diamond to graphite at 298 K?

INFO:
graphite: standard enthalpy = 0 & entropy=5.740
diamond :standard enthalpy = 1.897 & entropy=2.38

QUESTION:

What is the standard Gibbs free energy for the transformation of diamond to graphite at 298 K?

Cdiamond —> Cgraphite

Just u should know the formula
which is
DeltaG°=DeltaH°-TDeltaS°=

And the Final Answer should be -2.9

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