Sоme students isоlаted DNA frоm unknown bаcteriаl samples and did PCR to amplify the 16S rRNA gene for sequencing. Because sequencing costs money and the students are poor, they decided to run their samples on a gel to verify that they amplified the right DNA fragment before spending what little savings they have left. If the expected fragment size was 1500 base pairs, which student(s) was successful?