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**Help .......**

I need help with these problems and anyone who can respond to these asap... it would be very much apprciated... so here they are I am so confused please help me...

1.) what is the magnitude of the average acceleration of a skier who starting from rest reaches a speed of 5.5m/s when going down a slope for 5.2 s...... part b.. how far does the skier go in this time?

2.)A drag racer starting from rest, speeds up for 402 meters with an acceleration of +24.0m/s^2 a paracutte opens slowing the car down with and acceleration of -6.90 , how fast is the racer going 395 m after the paracutte opens?

3.) A ball is thrown upward from a 26.6m tall building at and inital speed of 12m/s.. at the same instant a person running on the ground at a distance of 29.8m from the building.. what must be the average speed of the person if he is to catch the ball at the bottom of the building?

ANY HINTS PLEASE.. ITS IMPORTANT.. thanks....