From Bach to Mozart to Beethoven, the young Felix absorbed it all: with festival artistic director Wu Han at the piano, the 15-year-old Mendelssohn’s vivacious Opus 110 Sextet rocked Stent Family Hall on Sunday evening to close the season’s second performance of “From Bach.” Monday night offers the summer’s final opportunity to catch this incisive program, tracing the trajectory from Baroque counterpoint to early Mendelssohnian Romanticism. Monday also features the first in the season’s master class series, with violinist and perennial festival favorite Ian Swensen coaching the young artists of the International Program in Mozart’s Clarinet Quintet. Clarinetist Romie de Guise-Langlois and the LK String Quartet will perform this sublime work at tonight’s Prelude Performance (6:00 p.m., Martin Family Hall).