Respond to the following questions with a Yes or a No.

Respond to the following questions with a Yes or a No. 1) Is a concave function one such that it attains to a maximum value? 2) Is definite integration the non-addition of functional differences across a defined continuous space? 3) Do all economic agents face some kind of resources constraint? 4) Does a rise in the quantity of demanded diamonds cause an increase in price of demanded diamonds? 5) Can dynamical systems be never unstable? 6) Is the variation of parameters method more general than the undetermined coefficients method? 7) Are white noises in economics understood as shocks to endogenous variables? 8) Is Neo-Keynesianism truly demand sided? 9) Are all policy robust models time independent? 10) Is time independence a sufficient condition for optimization problems