A spherical ball of radius four units is in a corner touching both walls and floor.What is the radius of the largest spherical ball that can be fit into the corner behind the given ball? (Hint: The smaller ball will not touch the corner point where the walls meet the floor.) 
Definitions:
Presidential Elections
The process by which the president and vice president of the United States are chosen through a combination of votes from the public and the Electoral College.
Electoral College
A body of electors established by the United States Constitution, which formally elects the President and Vice President of the United States.
State Legislatures
Elected bodies within the United States responsible for making state laws and policies.
Original Election
The first occurrence of an electoral process to fill a public office or adopt a proposal.
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