Find the Period and Amplitude of the Function $y = \frac { 7 } { 2 } \sin \left( \frac { \pi x } { 2 } \right)$

Multiple Choice

Find the period and amplitude of the function $y = \frac { 7 } { 2 } \sin \left( \frac { \pi x } { 2 } \right)$ .

A) Period: $2 \pi$ ; Amplitude:7
B) Period: $2 \pi$ ; Amplitude: $\frac { 7 } { 2 }$
C) Period: $2$ ; Amplitude: $\frac { 7 } { 2 }$
D) Period: $4$ ; Amplitude: 7
E) Period: $4$ ; Amplitude: $\frac { 7 } { 2 }$