Please help, will mark 1st answer as brainiest

Questions: -find the number of sandwich options using one bread, one meat, and one veggie. -find the number of sandwich options using one bread, two meats, and three veggies.(no repeats) -how many vegetarian options can be made? no meats, all the veggies, and one bread.

How many triangles can be drawn with side lengths 4 centimeters, 4.5 centimeters, and 9 centimeters? explain

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?