An incrementer is a special kind of adder that takes in one input and adds 1 to it. (That is, it computes S = X + 1). Show how you can build a 4-bit incrementer using only half adders. (Remember, a half adder has two inputs and two outputs—it does not have a carry-in input.)

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer,e = 5 × 105?