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U5+U7= a+4b+a+6b = 144
= 2a + 10b = 144
= a + 5b = 72
a + 2b = 36
a + 5b = 72 -
-3b = -36
b = 12
a + 2(12) = 36
a = 12
S10 = 5(24 + 108)
= 5(132)
= 660