Choose the proper symbol to replace . 
0.1111 
Definitions:
Ceteris Paribus
A Latin phrase meaning "all other things being equal," used in economics to analyze the effect of one variable change while holding others constant.
Perfectly Competitive Industry
A market structure where there are many buyers and sellers, products are identical, and there is free entry and exit from the market.
Identical Products
Products that are exactly the same in every aspect, including quality, size, and features, making them perfectly substitutable for one another.
Perfectly Elastic Demand
A market situation where demand for a product is infinitely responsive to changes in price, depicted by a horizontal demand curve.
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