Digital Arithmetic Operations and Circuits Questions

• Packages are used to contain ________ and other information that must be available to all entities in the design file.
• Negation is performed by simply performing the ________ operation.
• Subtraction of the 2's-complement system actually involves the operation of ________.
• In VHDL, the architecture declaration always begins with the ________ of variable signals or components that will be used in the concurrent description between BEGIN and END.