Write a formula for creating intermediate colors

The intermediate colors are: Red-Orange, Yellow-Orange, Yellow- Green, Blue-Green, BlueViolet, and Red- Violet The Intermediate colors are made by mixing equal amounts of a primary and a secondary color.

answer; i believe the correct answer is in new york,in subway stations,public murals and night clubs;

there is not really a certain expensive film type but i believe all of them cost mostly the same price, i hope this a little bit