A computer program generates a sequence of numbers a1, a2, a3, ... such that a1=1, a2=2, and ak=a(k-1)*5 - 3 for 2 < k < n. If n = 10, find a5. Options:
A) 115
B) 137
C) 141
D) 151
E) 157
a1=1   a2=2   a3=2*5-3= 
<gadget id="calculator">2*5-3</gadget>
<output>7</output>
7   a4=7*5-3=35-3= 
<gadget id="calculator">35-3</gadget>
<output>32</output>
32   a5=32*5-3=160-3= 
<gadget id="calculator">160-3</gadget>
<output>157</output>
157   157
<result>E</result>
A computer program generates a sequence of numbers a1, a2, a3, ... such that a1=1, a2=2, and ak=a(k-1)*5 - 3 for 2 < k < n. If n = 10, find a5.