MagTech assembles laptops from four major components arranged as follows:

An illustration presents three components, A$,$ C$,$ and D connected in a series. Another component B is connected in parallel to component C$.$

The components can be purchased from three different vendors, who have supplied the following reliability data:

Component

Vendor

$1$

$2$

$3$

A

$0\mathrm{.}94$

$0\mathrm{.}88$

$0\mathrm{.}92$

B

$0\mathrm{.}80$

$0\mathrm{.}80$

$0\mathrm{.}90$

C

$0\mathrm{.}90$

$0\mathrm{.}88$

$0\mathrm{.}95$

D

$0\mathrm{.}93$

$0\mathrm{.}88$

$0\mathrm{.}90$

If MagTech has decided to use only one vendor to supply all four components, which vendor should be selected?

Would your decision change if all the components were assembled in series?