for this question researchers were aiming to have sufficient statistical power (.80) to detect a medium effect size at an alpha level of .

for this question researchers were aiming to have sufficient statistical power (.80) to detect a medium effect size at an alpha level of .05. i have to calculate the sample size, i have been given 4 options

• 156 participants
• 135 particiapnts
• 52 participants
• 45 participants

which one is correct?