Answer :
All you have to do is subtitle the t1 in the equation
T2= 5(-4)= -20 don the same thing for all of them :
-100 t3
-500. T4
-2500 t5
-12500 is t6
T2= 5(-4)= -20 don the same thing for all of them :
-100 t3
-500. T4
-2500 t5
-12500 is t6