4. Add a repeating decimal point above the digits after the decimal in the number 0.20120415, to form repeating decimals. Among these repeating decimals, the largest is $\qquad$ , and the smallest is $\qquad$ _.
Large: $0.2012041 \dot{5}$  
Small: $0.2 \dot{0} 12041 \dot{5}$