Помогите написать предложения по образцу

1. If we are careful we will leave behind our competitors. a) If we were careful we would leave behind our competitors. b) If we had been careful we would have left behind our competitors.
2. If we phone R.D., we will get the necessary information. a) If we phoned R.D., we would get the necessary information. b) If we had phoned R.D., we would have got the necessary information.
3. If we change the ingredients, we will be ready for the price rise. a) If we changed the ingredients, we would be ready for the price rise. b) If we had changed the ingredients, we would have beeb ready for the price rise.
4. If the price of jam goes up, the increase will be passed on the consumer. a) If the price of jam went up, the increase would be passed on the consumer. b) If the price of jam had gone up, the increase would have been passed on the consumer.
5. If they work hard, they won't lose any customers. a) If they worked hard, they wouldn't lose any customers. b) If they had worked hard, they wouldn't have lost any customers.
6. If we schedule the product development in time we will be ready for the change of the demand. a) If we scheduled the product development in time we would be ready for the change of the demand. b) If we had scheduled the product development in time we would have been ready for the change of the demand.
7. If we don't lose the chance, the competitors products will stay on the super-market shelves. a) If we didn't lose the chance, the competitors products would stay on the super-market shelves. b) If we hadn't lost the chance, the competitors products would have stayed on the super-market shelves.