1_Design a combinational circuit that multiplies two 2-bit numbers,a1,a0 and b1,b0, to produced a 4-bit product c3,c2,c1,c0,. Use ANDgates and half-adders.
2_Construct a 16-bit parallel adder with four MSI circuits, each containing a4-bit parallel adder. Use a block diagram with nine inputs and fiveoutputs for each 4-bit adder. Show how the carries are connectedbetween the MSI circuits.