If the current i(t) for an element is −7.7tA for t≤0, and 5.9t A for t≥0.

Find the following:
(a) i(−9.8)
(b) i(3.7)
(c) The total charge that has passed through the element in the interval −9.8 ≤ t ≤ 3.7 .
(d) The average current that has passed through the element in the interval −9.8 ≤ t ≤ 3.7.