From the guide 9C,9D,9E,9F

I took out some problems , please take note and focus on the rest.
From the page 40 WB, 5, 6,10,17,19,20,23
From the page 41WB 23,24,32,40
Any questions? Please do not hestitate to ask,
we're all in this together; LET'S DO IT!