Briefly discuss and differentiate the following middle generation of Cellular/Telecom/Mobile technologies with other technologies in their respective families. i. 2.5G (General packet radio service: GPRS )
ii. 2.75G (Enhanced data rate for GSM Evolution: EDGE)
iii. 3.5G (High-speed downlink packet access: HSDPA) and 3.5G (High-speed Uplink packet access: HSUPA)
iv. 3.75G (High-speed packet Access: HSPA+)
v. LTE (Long term Evolution)

Dereck works for long hours on his computer.  he frequently experiences physical strain by the end of the day because he does not follow an important rule of ergonomics with respect to the use of keyboards.  which of the following actions of dereck could lead to physical strain? a.  placing the keyboard exactly in front of him while typingb.  keeping hands and wrists straight while typingc.  using wrist pads throughout the dayd.  pounding at the keys on the keyboard while typinge.  resting his hands on the keyboard when he is not typing