In a certain chemical processing plant, a liquid chemical element is used in a manufacturing process. Said chemical element is stored in three different tanks. A level sensor in each tank generates a HIGH-level voltage when the liquid level in the tank drops below 25%. Design the complete circuit to monitor the level of the chemical element that triggers an alarm when the level of at least two tanks falls below 25%. Implement the solution using the Intel 8051 microcontroller. 

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