please solve within 30 min

a) What are D/A converters and A/D converters and what are their uses? Explain a real-life application for an example of all this. To illustrate it better, you might use a block diagram. b) For the function (Y) executed by the circuit below (figure 1), write the minimized Boolean equation with its corresponding truth table: CD A,B 8 100 401 10 00 01 10 -Y Figure 1: A combinational circuit Note: Here A, B, C and D denote the input variables of the function c) Design a MOD-11 ripple multimode counter that can be manually RESET by an external push 10 button