Astronomy subject question: pls help me ;-;

Which of the following statements about light waves is correct?
1.As the frequency increases, the wavelength
decreases.

2.As the frequency increases, the wavelength
increases.

3.Changing the frequency has no effect on
wavelength.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =