A manufacturer determines that "t" employees will produce a total of q(t) units per day, where: q(t)=(5t+20)/(sqrt(3t^2+100)) If the demand equation for the product (price) is given by: p(q)=4500/(q+10) a) Determine the rate of change of income I with respect to workers t. b) What is the rate of change of income when there are twelve workers? give typed answer ASAP with proper explanation