Answer
mass of a person is 80 kg 
a) Mexico City, Mexico 
acceleration due to gravity in mexico = 9.776 m/s²
weight = 80 × 9.776 = 782.08 N
b) Cape Town, South Africa
acceleration due to gravity in cape town  = 9.796 m/s²
weight = 80 × 9.796 = 783.68 N
c)  Tokyo, Japan
acceleration due to gravity in cape town  = 9.798 m/s²
weight = 80 × 9.798 = 783.84 N
d)  Chicago, IL
acceleration due to gravity in cape town  = 9.803 m/s²
weight = 80 × 9.803 = 784.24 N
e) Copenhagen, Denmark
acceleration due to gravity in cape town  = 9.815 m/s²
weight = 80 × 9.815 = 785.2 N