7. Consider the function y = 2 sinr. Make sure to use exact unit circle radian values to answer the questions (decimal answers will lose credit). (a) Use unit circle values to find the r-intercepts. () Find the critical points. (c) Establish using the second derivative test which critical points are maximums and which are minimums. Ctu) Use the second derivative to find any inflection points. (e) Use the second derivative to find intervals of upward concavity and downward concavity. (f) Graph the function using the information you have found