In the first movement of the fifth of these pieces, a solo marked senza stromenti lasts for about four minutes before the return of a ritornello that begins with pairs of sixteenth notes on “D, F-sharp, A, high D.” The third of these pieces begins with the fast violin pickup “G, F-sharp, downbeat G.” In most performances of the third of these pieces, (-5[1])its second movement is (10[1])an improvised keyboard cadenza since the score only contains two (10[1])chords. The last piece in this collection features two viola soloists, while its ripieno group lacks violins. This collection’s composer was hired by the Thomaskirche (“TOH-moss-keer-shuh”) after it failed to earn him a job with Margrave Christian Ludwig, and its fifth entry features flute, violin, and harpsichord soloists. For 10 points, name these six concertos by J. S. Bach. ■END■ (10[2])