Fixtures, Inc., in a signed writing, contracted with Apartments for the sale to Apartments of 50 identical sets of specified bathroom fixtures, 25 sets to be delivered on March 1, and the remaining 25 sets on April 1. The agreement did not specify the place of delivery, or the time or place of payment. Which of the following statements is correct? 
Fixtures must tender 25 sets to Apartments at Apartments' place of business on March 1, but does not have to turn them over to Apartments until Apartments pays the contract price for the 25 sets.  Fixtures has no duty to deliver the 25 sets on March 1 at Fixtures' place of business unless Apartments tenders the contract price for the 25 sets on that date. Fixtures must deliver 25 sets on March 1, and Apartments must pay the contract price for the 25 sets within a reasonable time after their delivery.  Fixtures must deliver 25 sets on March 1, but Apartments' payment is due only upon the delivery of all 50 sets. 