Show me the steps to solve $\backslash$table$[[1,2,3,4,5,6,7,8,9],[$Activity$,\backslash$table$[[$Manhours$],[$per Unit$]],\backslash$table$[[$Men per$],[$gang$]],\backslash$table$[[$Theoretical$],[$Gang size$]],$Actual Gang size,$\backslash$table$[[$Actual$],[$output$],[$rate$]],\backslash$table$[[$Activity Duration$],[$for one unit$]],\backslash$table$[[$Time from start on$],[$first unit to start last$],[$unit$]],\backslash$table$[[$Minimum$],[$buffer time$]]],[$A$,100,4,$X $1,$X $3,$X $5,$X $7,$x$\backslash$times $9,5],[$B$,350,6,$X $2,$X $6,$X $8,$X $10,5,]]$