Skill s ir determines the reward e ir forager i obtains from resource type r as a function of resource quality Q r: 5\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$ e_{ir} = Q_{r} s_{ir} + N(0, Z) $$ \end{document}eir=Qrsir+N(0,Z)