The standard Gibbs free energy change, \(\Delta G^\circ\), for the decomposition reaction \(\text{MCO}_3(s) \rightleftharpoons \text{MO}(s) + \text{CO}_2(g)\) was determined across a range of temperatures and plotted as a function of absolute temperature, \(T\), as shown below.

Based on the graph, which of the following correctly identifies the values of \(\Delta H^\circ\) and \(\Delta S^\circ\) for the reaction, along with the appropriate justification?