b$)$ A computer system is designed to start$-$up and operate only if one of the two conditions is

satisfied the BIOS and the Hard Disk working correctly, the BIOS working correctly and

either the Floppy Disk or the Pen Drive working correctly. Answer the following questions:

i$)$ Draw the reliability block diagram of the above system such that every unit appears

only once.

ii$)$ What is the reliability of the system? Assume that the reliability of the unit $i$ is $Ri$ and

that the units fail independently from each other.

iii$)$ Given the reliability values of the individual units in Table $1,$ what is the reliability of

the computer system?

Table $1$