21. What is the referencing environment for the block of code containing the variable myf2_var in bo below using static scoping? class RefEnvironment { private int x = 10; private inty = 20 ; public RefEnvironment (int x , int y) { this. x = x; this.y - Y; public void myf1 () { int myfl_var = 10; int result = myf1_var + 10; myf2 (); public void myf2 () { int myf2 _var = 20 ; int result = myf2_var + 20