Simple RS-Flip-Flops can be made from any two 2-input combinational logic gates plus some inverters. Design the following RS flip-flops, labeling S, R, Q, Q-Not (and clock, as necessary). Make sure you label the polarity of R and S when active (+ [=1] or - [=0]). 1. (CLO 4-Seq. Logic) An AND gate, an OR gate, and inverters as needed. Inputs S and R are active low (0). 2. (CLO 4-Seq. Logic) An AND gate, an OR gate, and inverters as needed. Inputs S and R active high (1). 3. (CLO 4-Seq. Logic) A NOR and a NAND plus inverters as needed. Inputs must be active low (0). 4. (CLO 4-Seq. Logic) A NOR and a NAND plus inverters as needed. Inputs must be active high (1)