Freeriding when trading in a cash account

I am trying to understand "freeriding" in a cash account. I have already read these SEC publications: Freeriding and Updated Investor Bulletin: Trading in Cash Accounts. The purpose of this question is to confirm that I have a correct understanding of "freeriding". Scenarios:

1. I have $1,000 in my cash account. On Monday morning, I buy 5 shares of ABC at $200 per share. A few hours later, I sell all 5 shares at $210 (profit: $50). On Tuesday, I buy 5 shares of ABC again at $200 per share.

   • From my understanding, this is freeriding because the buying on Monday morning used up all $1,000. The selling of those 5 shares on Monday will not be settled until Wednesday, so the Tuesday purchase is using cash that I do not have.

2. I have $1,000 in my cash account. On Monday morning, I buy 5 shares of ABC at $200 per share. A few hours later, I sell all 5 shares at $210 (profit: $50). On Tuesday, I use the profit from Monday to buy 1 share of another stock at $50 per share.

   • This looks like freeriding to me, but I am not sure.

3. I have $1,000 in my cash account. On Monday, I decide to day-trade a $5 stock. For simplicity, let us assume that the price of the stock remained at a constant $5 throughout the day. I buy 100 shares at 10am, sell 100 shares at 11am, buy 100 shares again at 12pm, sell 100 shares at 1pm.

   • From my understanding, there is no freeriding violation here. There will, however, be a freeriding violation if I later buy anything else on Monday or Tuesday. Reasoning: the Monday 10am-11am trade used up $500 which will only be settled on Wednesday. Similarly for the 12pm-1pm trade. After the 1pm trade, I will have no cash available for trading in my account until Wednesday.

Strangely, the simple scenarios above are not illustrated in the SEC articles. Is my understanding of "freeriding" correct? Is scenario (2) considered freeriding too?