please solve and explain.

1. Mass transfer involving coronavirus particles. Virus particles, such as the coronavirus, becomes airborne when they hitch a ride on moisture droplets ejected from people's noses or mouths when they sneeze, cough, talk, sing, or even breathe. What other processes or externally applied force(s) can influence this transport, and in what ways? a. Both big and small droplets can travel through the air by diffusionatural convection / osmosis, but the bigger the droplets, the higher their inertia, and therefore the more / less / no difference distance they travel before settling to the ground under gravity. Interestingly, N95 masks filter out both large and small particles as the wearer inhales, thus offering the best protection against any airborne virus that might be in the vicinity. b. Particles settling under gravity is an example of natural convection / forced convection /diffusion. But we know that people in an air-conditioned restaurant may become infected by the coronavirus even if they're more than six feet away from the person carrying the infection if they are sitting in the path of the air flow. This is an example of transport of the virus particles by natural convection / forced convection / diffusion. c. A face mask can serve as a barrier to air flow, and can act as filter to prevent droplets from leaving your mouth. Wearing two masks at. The same time has been found to be even more effective than a single mask at blocking the particles. This is because the additional fibers make the particles' path straighter / more tortuous, thus promoting / impeding the particles' motion, consistent with Newton's first law of motion. 2. Suppose you plane to burn wood for the purpose of generating heat. You can choose between wood that has been aged and dried, or wood that is from a tree that was only recently cut down. Which. Will give you a higher fuel efficiency per pound of wood? Explain