hello! how do i solve part C of this question? please explain step by step. thankyou lots.

Calculate the standard enthalpy change for the reaction 2A+B2C+2D where the heats of formation are given in the following table: Express your answer in kJmol1. Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the standard heats of formation of the substances involved in the reaction: rH=npfH(products)nrfH(reactants) Here, np represents the stoichiometric coefficients of the products, nr represents the stoichiometric coeffi cients of the reactants. The standard entropy change for the reaction, rS, is a measure of the change in how the energy can be spread out during the course of the reaction. The standard Gibbs energy change for the reaction can be estimated at any temperature using rG=rHTrS assuming rH and rS do not change with temperature. For the reaction in Part A, rS=25.0JK1mol1. What is the standard Gibbs energy of reaction at 283K. YG(283K) ? Express your answer numerically in kJmol1