Suppose we have relation r(a, b,c, d,e), with some set of fd'sand we wish to project those fd's onto relation s(a, b,c). give thefd's that hold in s if the fd's for r are:
a)ab--> de, c--> e, d--> c, and e--> a
b)a--> d, bd--> e, ac--> e and de--> b
c)ab--> d, ac--> e, bc--> d, d--> a and e--> b
d) a--> b , b--> c, c--> d, d--> e and e--> a

the today function returns a valid value without any arguments.

the today function returns the current date based on the computer's date setting and formatted as a date. today takes no parameters, but requires that you use empty parentheses

solution:

bookmark is a word, symbol, image, or other object that links you to another element in another location.

bookmark is a saved shortcut that directs your browser to a specific webpage. it stores the title, url, and favicon of the corresponding page. saving bookmarks allows you to easily access your favorite locations on the web.

it works in all modern web browsers include bookmark features. bookmarks are called favorites or internet shortcuts in internet explorer, and by virtue of that browser's large market share, these terms have been synonymous with bookmark since the first browser war.