Need help with 2 and 3 ASAP and don’t say sorry can’t see just zoom in plz and I need an explanation for number 3 I’ll love u forever

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income