Suppose you have just made node 3 permanent with the distance label d[3] = 12. After making node 3 permanent, you consider the arc (3,7) with a length of 5. Currently, the distance label of node 7 is d[7] = 24 and the predecessor of node 7 is pred[7] = 5. After considering the arc (3,7) and making any necessary updates, what will be the value of pred[7]? (Enter a numerical value. Your answer must be correct within +/- 0.01.)