for this you would need to use visual studio code and start a dart web application project once you have that you need to edit the html file to look like those pictures then make the code in the main.dart file that while convert decimal to binary.

Error! Input field cannot be empty Part B: Bonus (3 marks) You can earn bonus marks by converting the input decimal number to hexadecimal as well. Display the result together with the binary equivalent as shown Decimal to Binary Calculator Decimal: 59 Convert to Binary 59 in binary: 111011 & in hexadecimal: 3B You must add another function called decimal To Hex() that accepts an integer and returns the equivalent hex string. You will also need to modify the convertBtnHandler() function