Answer:
TPM(Trusted Platform Module) is the correct answer to the following question.
Explanation:
Because TPM is the computer chip which protects your system data and store all keys and access of data that is encrypted by these keys. So that's why TPM is that hardware component which is used to contain the encryption keys and that data is not accessible to any other person's whether your hard drive will be lost or stolen by anyone.
Answer:
CPU
I dont know a whole ton about computers. But I'm confident this is correct. Without the CPU the other options on this list wouldnt work so the CPU would be the "heart".
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.