Mark is a college student who has been lifting weights at the student recreation center. Mark's weight has been stable at 154 lb 70 kg). An analysis of the total energy and protein content of Mark's current diet is 3470 kcal, 125 g of protein (14% of total energy intala supplied by protein). This diet is representative of the food choices and amounts of food that Mark chooses on a regular basis. The traine at the center recommended a protein drink to help Mark build muscle mass.

Determine Mark's protein needs based on the RDA (0.8 g/kg).
a. Mark's estimated protein RDA in g:
b. What are the maximum recommendations for protein intake for athletes in g/kg?