FIRST ACTIVITY (100/100) PROBLEM: An LED is lit ("1) when the combination of switches represent an unsigned integer number greater than 9 (i.e., when the switches are 1010, 1011, 1100, 1101, 1110, or 1 1 1 1), where'l, represents the ON position of a switch and '0' the OFF position. abcdf 000 0 0 0 1 0 01 0 l0 0 01 1 l0 0 1 0 0 O 0 1 0 1 0 1 1 0 0111 1 0 00 1 0 0 1 1 01 0 1 01 1I 1 100i 1 1 01 1 1 1 1 0 Complete the truth table for this circuit: Derive (simplify is possible) the Boolean expression