I need help with these four problems

Problem #1:

If the national debt of a country (in trillions of dollars) 1' years From nowI is given by the indicated Function, Find the relative rate of change of the debt 3 years from now. (Round your answer to two decimal places.) Nu\") - 0.6 + 1.51203\" % per year Consider the following function. ((t ) = e-tz (a) Find the relative rate of change. (b) Evaluate the relative rate of change at t = 13.Consider the following function. f(t) = 15v t - 3 (a) Find the relative rate of change. (b) Evaluate the relative rate of change at t = 7.For the demand function Dip}, complete the Following. 4o Dip} ' p2 (a) Find the elasticity of demand Ep}. {b} Determine whether the demand is elasticr Inelastic, or unit-elastic at the price p - 3G. (j. elastic .3. inelastic (\"j unit-elastic