Answer:
a) Speedup gain is 1.428 times.
b) Speedup gain is 1.81 times.
Explanation:
in order to calculate the speedup again of an application that has a 60 percent parallel component using Anklahls Law is speedup which state that:

Where S is the portion of the application that must be performed serially, and N is the number of processing cores.
(a) For N = 2 processing cores, and a 60%, then S = 40% or 0.4
Thus, the speedup is:

Speedup gain is 1.428 times.
(b) For N = 4 processing cores and a 60%, then S = 40% or 0.4
Thus, the speedup is:

Speedup gain is 1.81 times.
a. True This is because it covers only a short distance and allows sharing of data between short distances(PAN)
Input device
A cpu processes all your programs
An input device is something like a keyboard or mouse, when you use it it inputs data to the computer
An output device is something like your headphones
Software is a program that you run like microsoft word
Email headers contains information about email
A virus, malware, unplugged, used too much storage, etc.