Using the standard enthalpies of formation, what is the standard enthalpy of reaction?

using the standard enthalpies of formation, what is the standard enthalpy of reaction?

CO(g) +H2O(g) =CO2 (g) + H2 (g)

Concepts and reason
The standard enthalpy of formation:
It is the enthalpy change when one mole of a substance is formed from its pure elements under standard conditions.

Fundamentals
The formula to calculate standard enthalpy of formation is given below:
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Answer:

The balanced chemical equation is as follows:
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The formation values are as follows:
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Explanation:
The balanced chemical reaction is written and the formation values are indicated for each species.

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Explanation:
The standard enthalpy of reaction is written and the values of standard enthalpies of formation were substituted and solved to get the answer.