1.1 The variable panel references a JPanelobject.The variable bGroup references a ButtonGroupobject,which contains several button components. If you want to add the buttons to the panel.. A) add each button to panel one at a time, e.g. panel.add(buttonl); B) use the statement, panel.add(bGroup); C) use the statement, bGroup.add(panel); D) use the statement, Panel panel new Panel(bGroup); Ans: 1.2. To click the JRadioButton referenced by radio, write the following code. A) radio.Click0 B) radio.doClick0: C) Click(radio); D) Click(radio, true); Ans: 1.3. Assume that the variable checkbox references a JCheckBox object. To determine whether the check box has been selected, use the following code. A) if (checkBox.isSelected0) /*code to execute, if selected* /) B) if (isSelected(checkBox)) /*code to execute, if selected C) if (checkBox) /*code to execute, if selected*) D) if (checkBox.doClick0) I*code to execute, if selected* Ans