2. What are the differences between DRAM and SDRAM? 3. What are the differences between DRAM and SDRAM in terms of characteristics such as speed, size and cost? 4. Explain why one type of memory is considered analog and the other type digital 5. What are the differences between EPROM, EEPROM and Flash Memory? 6. What is a parity bit? 7. How does SDRAM differ from DRAM