I need help with 2,3,4 please

1. Design a sequential circuit for a vending machine controller where a product sells for 30 cents, and the machine takes quarters, and dimes only. It also releases 5 cents, 15 cents and 20 cents for changes. Show the complete design using D-FFs including the Transition Diagram, Transition Table and combinational circuits. 2. Carry out a step by step procedure of Booth algorithm in multiplying the two 6-bit2's complement numbers: a. Multiplicand: 010011 Multiplier: 101101 b. Multiplicand: 110101 Multiplier: 001101 Give the snapshots of the two registers' values for each cycle after the shift operation is performed. 3. Using the approach of Combinational Array Multiplier (CAM) a. Determine the exact number of AND gates and Full Adders needed to build a CAM for unsigned 16-bit multiplier. Assume only AND gates and Full Adders are available. Also determine the worst-case delay in terms of d (where d is two-level logic delay) b. Draw the detail design for a 5-bit CAM 4. Determine the delay in terms of d (where d is two-level logic delay) for divide -and-cascade CLA design using modular components for a 64-bit CLA design when fan-in is limited to 5. Justify your answer with diagrams