10. (10 points) The seven-segment indicator (see the figure below) can be used to display any one of the decimal digits 0 through 9. For example, "1" is displayed by lighting segments 2 and 3, "2" is displayed by lighting segments 1, 2, 7, 5, and 4, "8" is displayed by lighting all the seven segments. A segment is lighted when a logic 1 is applied to the corresponding input on the display module. Seven-Segment Indicator Inputs From Toggle Switches B Network to be Designed X X X3 X4 X5 X6 X7 01 -02 -03 -04 -05 06 -07 6 2 8 5 Figure 1: Seven-segment display module Design an 8-4-2-1 BCD code convertor to drive the seven-segment indicator in Fig. 1. The four inputs to the convertor network (A, B, C, D in Fig. 1) represent an 8-4-2-1 Use (not ) for 6. Use (not ) for Figure 2: Configuration of the seven-segment display module for "6" and "9". (a) Build the truth table of your seven-segment display module. (b) Using K-maps, find the minimum SOP expression for XI,X2,X3,X4,X5,X6, and X7 shown in Fig. 1.