Hi, my DD6 was tested recently and I was wondering does anyone know how to calculate the last two scores?

VCI 138
Pri 139
Wmi 141
PSI 112

How do they come up with the FSIQ and GAI? Tester commented on how close the first 3 scores are, that it's very unusaul to be within 3 points also that she hit ceiling on some of the I beleive what he call sub tests. She scored lower on the PSI because she was trying to memorize instead of referring back to, and also because of her age. Thanks for any input!