True or false?

$1.$Declarative Sentences end with an Exclamation Mark

$3.$Computer is a concrete noun.

$4.$Decision Making Problem Solving are one of the objectives of business communication.

$5.$Upward communication is the flow of information from the front line employees towards the managers. $6.$Effective communication does not increase the Efficiency or productivity of the organiztion.

$9.$An interoffice memo is typically used by firms for external communication.

$10.$A Complimentary close ends the main body at a positive note.

$11.$Interoffice memos can be paper based as well as can be sent using emails.

$14.$Writing the date and adding the signature is not important in the business letters.

$15.$You should always specify your needs and ask precise questions while writing the inquiry letters.

$17.$Knowing your audience in advance helps you to write your contents in a better way. $18.$Recommendation letters assess the capablities or qualities of the person for whom the letter is written.

$20.$An Inquiry type of email or letter usually does not have a question or a query in it$.$