Solve the following in Python.

1.

def add2(a: int) -> int:

"""

add2(a) returns the value of the integer a + 2

example: add2(2) -> 4

example: add2(-2) -> 0

example: add2(0) -> 2

:param: a: the left-hand value of the addition operation

:returns: integer value of the operation a + 2

""" return a + 2

"""

negate_a_mul_b(a, b) returns value of the operation -a * b

example: negate_a_mul_b(-2.0, 1.0) -> 2.0

example: negate_a_mul_b(-2.0, -2.0) -> -4.0

example: negate_a_mul_b(1.0, -2.0) -> 2.0

example: negate_a_mul_b(0.0, 0.0) -> 0.0

TODO: add param and return descriptions here

TODO: finish this function definition

2.

""" """

sind_approx(x) returns the Bhaskara I's sine approximation for sine in degrees.

This approximation is only valid within the range [0, 180].

The sine approximation is given as: 4 * x * (180 - x) / (40500 - x * (180 - x))

example: sind_approx(90.0) -> 1.0

example: sind_approx(0.0) -> 0.0

example: sind_approx(180.0) -> 0.0

example: sind_approx(45.0) -> 0.7058823529...

TODO: add param and return descriptions here

TODO: finish this function definition

"""

"""