How can we synthesize pentanedioic acid from Propanediol 1, 3?

What reactions have you learned that can make a carboxylic acid?

what do you think you could do witht the functional groups in the molecule that would allow you to install those carboxylic acids?

1,3-Propanediol has 3 carbon atoms in contrast to (obviously) 1,5-pentanedioic acid (= glutaric acid), which has 5 carbon atoms. Or else:
Which reactions sequence can substitute the hydroxyl groups and can further lead to the addition of two carboxylic groups in the propane chain?