Help!

If anyone out there can help me with these prblems, I would gratly apprecaite it:

1) Given the limit (3+(x^2)*(sin1/x)) as x approaches zero, find the limit graphically and show how the Sandwich Theorem can be used to confirm your answer.

2) For the function y=(e^x)-(2x^3)+15x, find: a) a simple basic function right end behavior model, and b) a simple basic function left end behavior model.

3) Use the concept of composite functions to explain why h(x)=|(x^2)-(4x)-6| is a continuous function.

4) The equation for freefall at the surface of the planet Quixon os s=3.8t^2 meters with t in seconds. Assume a rock is dropped from the top of a 400-m cliff. Find the speed of the rock at t=6 sec.

5) Find the points of discontinuity of the function y=((x^2)+x-2)/((x^2)+5x+6). For each discontinuity, identify the type of discontinuity (removable, jump, infinite, or oscillating.)

Thanks!