if there is a even number of ‘1’s and parity used is even, so the parity bit will be 0? [Jason] Yes.
if there is an odd number of ‘1’s and parity used is odd, so the parity bit will be 0 as well? [Jason] Yes.
if there is no parity used ie neither odd nor even, the bit will be 0 regardless of the even or odd number of ‘1’s exist in the data stream? [Jason] If parity is not used, then there is no parity bit!
to determine the period of the baud rate, so the formula, t=1/f will be used to calculate since the baud rate is known? Yes. Baud rate tells you the number of bits in a second. The period tells you how long it takes to send a bit.