Answer:
When the demand for French bread rises, the price of French bread will likely increase as well. This means that the quantity of French bread that sellers are willing and able to sell at each price will increase. As a result, the total amount of revenue that sellers of French bread receive will increase, which means that producer surplus in the market for French bread will increase.
In the market for flour, the increase in demand for French bread may lead to an increase in the price of flour. This is because the increased demand for French bread will likely increase the demand for flour as well, since flour is a key ingredient in making French bread. As the price of flour increases, the producer surplus in the market for flour will also increase.
It's worth noting that the exact change in producer surplus in the market for flour will depend on the elasticity of supply of flour. If the supply of flour is relatively inelastic, the increase in price will result in a larger increase in producer surplus, whereas if the supply of flour is more elastic, the increase in price will result in a smaller increase in producer surplus