A classroom clock has a small magnifying glass embedded near the end of the minute hand. The magnifying glass may be modeled as a particle. Class begins at 7:55 and ends at 8:50. The length of the minute hand is 0.211 m. (a) Find the average velocity of the magnifying glass at the end of the minute hand using the coordinate system shown in the figure. Give your answer in component form. (Assume the time period is that of the described class.) Vav = -(2.34x10 )x - (2.34x10 5)y Your answer includes 2 characters that can't be graded. m/s Delete your recent changes and use the pad tools to finish your answer. More information x (b) Find the magnitude and direction of the average velocity. magnitude 3.31 x 10*e (-5) X Your answer cannot be understood or graded. More Information m/s direction 45 . below the -x axis (c) Find the average speed. 3.68 * 10*e^(-4) X Your answer cannot be understood or graded. More Information m/sFrustrated with her physics class, Janet leaves campus and walks into town to acquire some refreshments. She continues on to a friend's house, where she happens to meet a physics tutor. The tutor agrees to help her, and Janet and the tutor walk to the nearby library to study before the upcoming exam. Janet's three displacements can be described by the following vectors: Ar, = (550/ - 205j) m, Arz = (440j) m, and Ary = (-300/ + 142;) m. What is Janet's total displacement? (Express your answer in vector form.) Ar = 250i + 377j m