Express the following angles in radians:
(a) 12∘ 28'
(b) 36∘ 12'

a) (a) {47π}/{315} , (b) {181π}/{315}
b) (a) {7π}/{180} , (b) {19π}/{90}
c) (a) {47π}/{180} , (b) {61π}/{180}
d) (a) {181π}/{90} , (b) {47π}/{315}