How many 256x8 ram chips are needed to provide a memory capacity of 4096 bytes? how many bits will each address contain?

Aresearcher wants to do a web-based survey of college students to collect information about their sexual behavior and drug use. direct identifiers will not be collected; however, ip addresses may be present in the data set. risk of harm should be evaluated by: solely by the magnitude or severity of expected harm. both the magnitude (or severity) and the probability (or likelihood) of harm. solely by the probability of expected harm. neither the magnitude or probability of harm.