Crosswords Derek and Steve

Derek and Steve are doing a crossword puzzle. They guess words with different numbers of letters. They figure out the word quiz, the animal zebra, the capital of Colombia, Bogota, and the fruit orange. They also mention that Shakira is from Barranquilla. They correctly guess the words drum and ruler. 3, 4, 5, letters, what could that be? Hey Derek, what are you doing? A crossword puzzle. A form of examination. Four letters. Is it a quiz? No, Steve, it's a crossword puzzle, not a quiz. Derek, I know. I mean, it's the word in the puzzle quiz. Oh, right, um... Q-U-I-Z, quiz. That's right. Now, an exotic animal. Hmm... How many letters? Five letters. First letter, Z. Oh, I know, it's easy. It's zebra. Z-E-B-R-A, zebra. Excellent. Um, the capital of Colombia. First letter, B. Brasilia. B-R-A-S-I-L-I-A. No, that's eight letters. The capital of Colombia is six letters. Right, Brasilia is the capital of Brazil. Hmm, let's try another word. A citric fruit. A lemon. Um, L-E-M-O-N. No, lemon is five letters. This word is six letters. Is it an orange? Um, O-R-A-N-G-E. Yes, it's orange. Okay, now, this is easy. The king of fruits, apple. An apple a day keeps the doctor away. So, the capital of Colombia. Six letters. First letter, B. Fourth letter, O. Last letter, A. It's Bogota. B-O-G-O-T-A. That's right, perfect. Yes, where Shakira is from? Um, no, Shakira is from Barranquilla. First letter, B. Last letter, A. But, eleven letters, not six. Now, a measuring instrument. Five letters. Fourth letter, E. Let's find another word. Okay, a percussive instrument. Four letters. Oh, that's easy, drum. D-R-U-M, drum. Perfect. Now, the last word. A measuring instrument. Five letters. Second letter, U. Fourth letter, E. I think I know what it is. It's a ruler. R-U-L-E-R. That's it, ruler. Yes.