Given the following information, state whether the perfectly competitive firm

Given the following information, state whether the perfectly competitive firm should shut down or continue to operate in the short run.
a. Q = 100; P = $10; AFC = $3; AVC = $4
b. Q = 70; P = $5; AFC = $2; AVC = $7
c. Q = 150; P = $7; AFC = $5; AVC = $6