Please help! 10pts
A student made the following diagram to represent cellular respiration.

See picture of diagram below

Why is this diagram incorrect?

Water is not formed during this process.
Carbon dioxide is not formed during this process.
The arrow for oxygen should point in the opposite direction.
The arrow for glucose should point in the opposite direction.

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.