**Answer 1**

1 N = 1 kg m/s^2

14.59 kg = 1 slug

1 kg = 1/14.59 slug

0.3048 m = 1 ft

1 m = 1/0.3048 ft

so

1 N = 1/14.59 slug x 1/0.3048 ft /s^2 = 0.2249 lb.

**Answer 2**

15kg*m (1 slug/14.59kg) (1ft/0.3048) = 3.37

You practically ignore s^2 since you don’t need to convert it.