4. (10 marks) (1) Analysis the diagram and write down the corresponding logic function A B | (2) A 3-input truth table is shown below. Find the minimal sum-of-products and product-of-sums expression for the output F. B A F 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 1 1 1 1 0 1 1 1 1 1