The integrals are
and
.
(a) The integral is
.
Apply Additive interval property
.
Substitute
and
.

.
.
(b)
\The integral is
.
Apply Definition of special definite integrals
.
Substitute
.

.
.
(c)
\The integral is
.
Apply Definition of special definite integrals
.
.
(d)
\The integral is
.
Apply formula:
.

Substitute
.

.
.
(a)
.
(b)
.
(c)
.
(d)
.