I need a little bit of help with my work!
Q1 -
Find the geometric means in the following sequence.

-9, ___, ___, _, _, -69,984

Q2-
Find Sn for the given geometric series. Round to the nearest hundreth
a1= 0.1 , a5= 814.5, r=9.5
Use the formula: Sn= Sn = a(1 - rn) / (1 - r)

Q3-
Find a1 for the given geometric series. Round to nearest hundredth.
Sn= 47,615 , r= 3, n=5
Use the formula : Sn=a1-a1r^n/1-r

Q4 -
Find the sum of this geometric series. You can use either formula