Explain what is meant by a combinational logic circuit?

Consider the simple combinational logic circuit in Figure $1$:

$1$

$1$

Construct a Truth Table for this circuit.

Construct a Karnaugh Map from your Truth Table.

Use your Karnaugh Map to devise a simplified Boolean Algebra expression for the circuit.

Task $1$

Given the following Boolean Algebra expression for a circuit:

Construct a Truth Table for this circuit.

Construct a Karnaugh Map from your Truth Table.

Use your Karnaugh Map to devise a simplified Boolean Algebra expression for the circuit.

Only certain logic gates are available to design a logic circuit within a specific area of a silicon chip, hence.

Re$-$design the circuit given in Task $1$ using only NAND gates.

Re$-$design the circuit given in Task $2$ using only NOR gates.