West will open 1♣ 

North does not have the shape so will pass.

East will pass

South may balance as his partner probably has HCPs but could not bid. He will balance with a double.

Balancing in this position is a key skill. You should always try to bid here. The hand asre likely to be balanced between the two pairs.

Here are a couple of links on balancing. https://www.bridgewebs.com/nwt/Bob%20Hertzog%20-%20Sept%204%20-%20Common%20Sense%20Bidding%20-%20Balancing.pdf and https://www.larryco.com/bridge-articles/balancing-on-the-1-level

West will probably double.

North has a difficult decision, whether to bid 2 or 3NT?

North's values are good sitting over the opening bidder, but his KQ♥ are not worth a full 5HCPs. If you bid 2 you get a top!