The _____ gate has two or more input signals. All inputs must be high to get a high output

The 2's compliment of binary number 0.01011 is:

Conversion of decimal number 99₁₀ to it's octal number equivalent is

Conversion of decimal number 93₁₀ to hexadecimal number is

Computers use thousands of flip-flops. To coordinate the overall action, a common signal called the _____ is sent to each flip-flop.