Answer:
All three asked question are discussed deeply and extensively below in details specially Nelson Mandela, Desmond Tutu and international community pressure on South African government, against the end of apartheid.
Step-by-step explanation:
Nelson Mandela peacefully protested to terminate apartheid. he was imprisoned for 27 years for such treason. thousands of other South-African specially non whites were imprisoned and some were even executive for their resistance against apartheid.
Desmond Tutu contribute in Mandela's effort through led economic fight against the end of apartheid. he called for an economic boycott of his country, organised peaceful marches.
South African government was criticized on apartheid widely by both western nations and the United Nation. and protest were held in many countries.