Thank you for your help

The professor of ADMS 2320 asked her students to report their investments in stock and age. She picked 3 female and 4 male students from her class. Their responses and some relevant information are listed below: ("?" represents missing sample data values) (Note: IN ORDER TO GET FULL MARKS, SHOW ALL CALCULATION STEPS. FAILURE TO DO SO WILL RESULT IN A SCORE OF "0".) x= Investments y= Age x2 V2 x*y Xi - X ? 25 ? 625 -30000 -2342.8571 1000 30 1000000 900 30000 -142.8571 3500 12250000 161000 2357.1429 -1000 28 1000000 784 -28000 3700 50 13690000 2500 185000 2557.1429 2 ? -17500 -1642.8571 2500 43 6250000 1849 107500 Ex = 8000 Ey = 257 Ex2 =35880000 Ev2 =9999 Exy =408000 X = 1142.8571 y = 36.7143 , Variance of x = 4456190.4762, Variance of y = 93.9048. Sxy = 19047.6190 a) Calculate the MAD of the Investments sample data. b) Calculate the location of lower quartile of the age sample data