What is the difference between psychoanalysis and psychophysics?

a) psychoanalysis uses introspection and psychophysics doesn't.
b) psychophysics studies the five senses and their reaction to stimuli.
c) psychoanalysis attempts to resolve conflict.
d) both b and c

Mrs. foyle told yolanda that her test had 38 problems worth a total of 100 points. each test problem is worth either 5 points or 2 points. yolanda wanted to determine how many 2-point and how many 5-point questions are on the test. in the space below, determine how many questions of each point-value are on the test. show your work or provide an explanation to support your answer. need this asap