Radioactivity: Shielding, Activity, and Decay lab

do the lab PLEAS ASAP and give me the answers thank you!!

reference is:

part 1: http://www.thephysicsaviary.com/Physics/Programs/Labs/RadiationDetectionLab/index.html

part 2: Explain how the results for Part I support this assumption. Find the area of a sphere that is centered on the sample for each of your distances. Divide the area of the sphere by the area of the detector, then multiply by the rate of detections. This is the estimate of the total detections you would have if you captured every particle. The results of this part highlight how important random variation is in radioactivity experiments.

part 3: http://www.thephysicsaviary.com/Physics/Programs/Labs/RadioactiveShieldingLab/index.html

Introduction:

The study of radioactivity provided clues and evidence into the basic structure of matter. There are four main types of particles: the alpha, beta plus, beta minus, and gamma particles. They are characterized by their ability to penetrate materials. The sources of the radiation are characterized by their activity, particles per time, and the rate of change of the activity. We will also an exercise that shows the relationship between detections and distance from the source.

Activity is decays per unit time; a standard unit of activity is the curie (Ci) where 1Ci = 3.7X10¹⁰disintegrations per second. This is a large number so activity is frequently given in micro (m)or nano(n) curie (Ci). Another common unit is the becquerel (Bq) which is 2.70X10^-11 Ci.

The diameter of the detector is 12.2 mm.