Operator && (and)

Operator && is a binary infix operator: binary because it has two operands and
infix because the operator is written between its operands.

Here is an example:

    b && c

Expression  b &&  c evaluates to true only if both operands (b AND c) are true;
if at least one operand is false, it evaluates to false.

Fill in the values of the "truth table".

For each row, the entry in the column labeled "b && c" should contain
the value of expression b && c for the values of b and c given to the left.