The answers are too long. I have compiled them in Word and attached them below.
The triangle indicates that the clock signal is an edge-triggered signal.
The circle indicates that the signal is low-active (ie., inverted).
The 74LS74 has a positive-edge trigger clock (low to high).
Explanation:
Communication helps the management to know what the organisation wants and how it can be performed. Through effective way of communication it promotes the industrial peace and good relations. 7. ... It enables the management to take managerial decisions which depends upon the quality of communication.