Study the following information and answer the questions given below it :
A blacksmith has five iron articles $\text{A1, A2, A3, A4}$ and $\text{A5},$ each having a different weight.
- $\text{A1}$ weighs twice as much as $\text{A2}$
- $\text{A2}$ weighs four and a half times as much as $\text{A3}$
- $\text{A3}$ weighs half as much as $\text{A4}$
- $\text{A4}$ weighs half as much as $\text{A5}$
- $\text{A5}$ weighs less than $\text{A1}$ but more than $\text{A3}$
Which of the following is the lightest in weight?
- $\text{A1}$
- $\text{A2}$
- $\text{A3}$
- $\text{A4}$