Convert the given sentence into Indirect Speech:
Mary said to her husband, John, 'Can we go to the market to buy a new refrigerator?'
1
Mary asked her husband if she could go to the market to buy a new refrigerator.
2
Mary asked her husband if they went to the market to buy a new refrigerator.
3
Mary asked her husband if they can go to the market to buy a new refrigerator.
4
Mary asked her husband if they could go to the market to buy a new refrigerator.