Charlie has two guppies, Milly and Billy. Milly measures 1.71 centimeters and Billy measures 2.58 centimeters. How much larger is Billy than Milly? Question 2 options:

1.89 cm

4.4118 cm

4.29 cm

0.87 cm

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?