1- Design a logic circuit that receives a four-digit compact BCD code and returns its equivalent binary value.

2- Show a four-digit hex number on the 7-segments available on the Basys3 board. Use the slide switches to enter the number. In addition, use the pushbuttons as shown in the following figure to activate a 7-segment at a time.

3- Design a logic circuit that gets the ASCII codes corresponding to the lower-case letters a, b, c, d, e, f, g, h, l and show them on a right-hand side 7-segment. Use the slide switches to enter an ASCII code. This table shows the ASCII codes for these letters.