The manager of a venue during a 2-day music festival needs to decide on the line-up of DJs for each of the evenings. The venue needs 3 DJs on Friday and 3 DJs on Saturday. She has 6 DJs available, but each DJ can only present either Friday or Saturday. Each day has a different audience based on the different styles of the bands that played earlier. The manager collected average ratings of the match of the DJ genres and the style of the bands. She wants to optimally assign the DJs so as to maximize the total ratings score. Friday Saturday DJ 1 7 9 DJ 2 10 6 DJ 3 5 6 DJ 4 4 8 DJ 5 8 5 DJ 6 7 7 Question 18 (3 points) What is the correct way to write the assignment constraint for Friday's line-up