Identify the last date of the discount period and the credit period for the payment terms with ordinary dating

Invoice date February $13,2012$

Payment terms $2/10,$ n$/30$

A what is the last date of discount period $?$

B what is the last date of credit period? invoice date october $11,2014$

Payment terms $3/10,$ n$/45$

C what is the last date of discount period $?$

D what is the last date of credit period?

Invoice date february $13,2012$

Payment terms $3/10,$n$/45$

E what is the last date of discount period

F what is the last date of credit period?

Invoice date August $8,2014$

Payment terms $3/10,2\mathrm{.}50/30,$ n$/60$

G what is the last date of discount period?

H what is the last date of credit period?