Need help!!

1) 3 pts. Sketch the symbol for a (two-input) NAND gate, and construct its truth table (using O for false and 1 for true). 2) 3 pts. Sketch a circuit showing how a single NAND gate can function as a NOT gate (an INVERTER 3) 4 pts. Using 3 NAND gates, sketch a circuit which has 2 inputs (A and B) and which has A + B (i.e. A OR B) as its output. In other words, show how 3 NAND gates can be connected together to function as an OR gate