PS 11,12,13,15

PS 11
https://forms.gle/f2znkXuhyYWHmNJS9

Answer PS 11
https://docs.google.com/spreadsheets/d/1v0IDrPni_taQDHSwcNYxCw43OBORGpQ4WVZ16cORi64/edit?usp=sharing


PS 12
https://forms.gle/c23h7j5rC7dNVW5a6

Answer PS 12
https://docs.google.com/spreadsheets/d/1wMad5fsNEvZRJQTRtSdTN-Ir_IAYp7-ByiZvqUIkRfg/edit?usp=sharing

PS 13
https://forms.gle/aPDw8e1nYb1BJVnLA

Answer PS 13
https://docs.google.com/spreadsheets/d/16MQeeSXhX1BiXWQmq6q6PlD3UYhInS5SMwgdiF_wRdo/edit?usp=sharing


PS 15
https://forms.gle/S9DEyi7puAFXsxWv9

Answer PS 15
https://docs.google.com/spreadsheets/d/1_zV0XflI6EFFX39nT_w2KNX3nslwEWOnvPYXHpgKbKg/edit?usp=sharing