Digital logic 7segment display and kmap question If we had a

Digital logic 7-segment display and k-map question:

If we had a 7-segment display that shows the numbers from 0 through 7 and then we wanted to change the display from 0 to 9

1) What would change in the circuits display ?

2) how many input combinations are required to display hex numbers 0 to F

1) The input of 7 segment dipaly must control by 4 inputs, which is represent BCD number which represents 0 to 9

for example to represent 0 to 7 we need 3 bits named B,C,D. To represent upto 9 we need Four bits named A,B,C,D.

So to change display from 0-7 to 0-9, we need to change the control input combination 3 to 4.

2. To represent0(0000)- F(1111) we need four input compination