Write the following statements as logical predicates

and negate each of them $($sec $1\mathrm{.}3-$ ex $29$ book$)$:

a$.$ Some Web sites feature audio.

b$.$ Every Web site has both audio and video.

c$.$ Every Web site has either audio or video.

d$.$ Some Web sites have neither audio nor

video.

e$.$ Every Web site either has text or else has

both audio and video.