Which is the correct way to punctuate this sentence?(multiple choice)

How do you determine whether a relationship represented as as graph is linear or nonlinear

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish