"Spiderman is swinging from skyscrapers. He swings north 11 km, chasing down the Green Goblin. He then swings south 7 km to get a hot dog. After that, he swings 15 km to go to school. Finally, at the end of the day, he swings back home south 6.5 km to his apartment. He did this all in 8 hours A. What is Spiderman's average velocity?
B. What is Spiderman's average speed?

Please at least give me help with how to calculate this. Don't waste your time doing the actual problem. I just need the method of solving it.

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?