// Adapted from Sierra and Bates, Head First Java // Insert lines from the set below into the isLeapYear method of // YearCheck.java (suitably indented). You need not use all of them, and // you may use duplicates. // Java Notes: % means "remainder"; != means "not equal to". } } else { if (year % 100 != 0) { if (year % 4 != 0) { if (year % 400 != 0) { return true; return false;