Using only ADD4 adders and 2tetris creating a ADD6, how would someone modular a ADD4? the first add 4 is Add4(a=a[0..3], b=b[0..3], c=false, out=out[0..3] , carry=c1); how would the second add4 look like assume unsigned and The carry output reflects the overflow of the Add6 chip? Chip parts IN a[6], b[6]; OUT out[6],carry; using [4..7] will not work as this will be out of range