The following sections describe the details of the requirements. Part $1-$ Combinational circuit to determine the operations to be done $($for example if there is no coin inserted the machine will not work even if the user press coffee or latte options$).(2$ Marks$)$ a$)$ Identify the input and output variables. b$)$ Write the truth table. c$)$ Simplify the output function. d$)$ Implement the function as a sub$-$circuit in circuitverse.org and attach a screenshot of the circuit design.