(i)int age=Integer.parseInt(jTextField2.getText());if(age>=3 && age<=13){jOptionPane1.showMessageDialog(this, 'Welcome');}else{jOptionPane1.showMessageDialog(this, 'Sorry!You are either underage or overage!!');System.exit(0);}(ii)int count=0;if(jCheckBox1.isSelected())count++;if(jCheckBox2.isSelected())count++;if(jCheckBox3.isSelected())count++;if(jCheckBox4.isSelected())count++;if(jCheckBox5.isSelected())count++;if(jCheckBox6.isSelected())count++;jTextField3.setText(''+(count*1000));(iii)int fee=Integer.parseInt(jTextField3.getText());int disc=0;if(fee>1000)disc=fee*20/100;jTextField4.setText(''+(disc));(iv)int fee=Integer.parseInt(jTextField3.getText());int disc=Integer.parseInt(jTextField4.getText());jTextField5.setText(''+(fee-disc));