d) The circuit below is a switch-selectable voltage divider network. Determine ( R_{1} ), ( R_{2}, R_{3} ) and ( R_{4} ) value so that the tap points ( ( A, B ) and ( left.C ight) ) provide input voltage ( ( V_{ ext {in }} ) ) attenuations of ( imes 10, imes 100 ) and ( imes 1000 ), with the total resistance of the circuit of ( 10 mathrm{k} Omega ).

d) The circuit below is a switch-selectable voltage divider network. Determine R1, R2,R3 and R4 value so that the tap points (A,B and C) provide input voltage (Vin) attenuations of 10,100 and 1000, with the total resistance of the circuit of 10k