Unlimited tries Assume a char variable named big has been declared and assigned a value. Also assume a char variable named little has been declared. Write a statement that converts the contents of the big variable to lowercase. Assign the converted value to the variable little. The following if statement is incomplete, but it should display the word "digit" if the char variable ch contains a numeric digit. Otherwise, the statement should display "Not a digit." What Boolean expression would you write inside the parentheses of the if statement? if(System.out.println("digit"); ( lˉelse System.out.println( "Not a digit"); The following code uses a for loop to count the number of uppercase characters in the string object str. What Boolean expression would you write inside the parentheses of the if statement to complete the code? int total=0for (inti=0;i