"Everything is old-world, traditional techniques from Mexico," Ava emphasizes. The sisters embrace the ways their great-grandfather built and repaired instruments. (1) When crafting a Mexican guitarrón used in mariachi music, they use tacote wood for the top of the instrument. Once the wood is cut, they carve the neck and heel from a single block using tools like hand saws, chisels and sandpaper rather than modern power tools and believe that this traditional method improves the tone of the instrument. (2) Their store has a three-year waitlist for instruments that take months to create. (3) The family's artisanship has attracted stars like Los Lobos, who own custom guitars made by all three generations of the Delgado family. (4) For the sisters, involvement in the family business started at an early age. They each built their first instruments at age 9.

A train travels from Station A to Station E, passing through stations B, C, and D, in that order. The train has a seating capacity of 200. A ticket may be booked from any station to any other station ahead on the route, but not to any earlier station. A ticket from one station to another reserves one seat on every intermediate segment of the route. For example, a ticket from B to E reserves a seat in the intermediate segments BC, CD, and D-E. The occupancy factor for a segment is the total number of seats reserved in the segment as a percentage of the seating capacity. The total number of seats reserved for any segment cannot exceed 200. The following information is known: 1. Segment C-D had an occupancy factor of 95%. Only segment B-C had a higher occupancy factor. 2. Exactly 40 tickets were booked from B to C and 30 tickets were booked from B to E. 3. Among the seats reserved on segment D-E, exactly four-sevenths were from stations before C. 4. The number of tickets booked from A to C was equal to that booked from A to E, and it was higher than that from B to E. 5. No tickets were booked from A to B, from B to D and from D to E. 6. The number of tickets booked for any segment was a multiple of 10.