description can be found in the attached files
I AM A STUDENT OF BS-PHYSICS I HAVE SOLVED THESE PROBLEMS SEVERAL TIMES I WILL GIVE YOU THE SOLUTION OF THESE [url removed, login to view] PLEASE DON'T HESITATE TO CONTACT ME.
I have been studying physics since the past 5 year and am currently a student in India's top private tech university with a vast knowledge of the subject. I can very easily help you out. :)