Unlock the following structures by performing the corresponding tasks:
STRUCTURE - HOW TO UNLOCK Art Museum - Raise education level to 90. Basketball Court - Build two Tennis Courts, two Baseball Fields, and two Playgrounds. Bus Stop - Reach year 1920. Fusion Power Plant - Reach year 2030. High School - Raise the education level to 75. House of Worship - Raise population to 4,000. Large Garden - Build four Small Gardens, and raise the population to 50,000. Large Park - Build four Small Parks, and raise the population to 50,000. Mayor's House - Raise population to 22,000. Mayor's Statue - Raise population to 5,000. Museum - Raise education level to 100. Nuclear Power Plant - Raise education level to 115. Opera House - Build three Museums and three Art Museums. Recycling Plant - Construct a landfill zone. Soccer Field - Build two Tennis Courts, two Basketball Courts, and two Playgrounds, and raise the population to 70,000. Solar Power Plant - Reach year 2000. Space Port - Reach year 2050. Stadium - Raise population to 350,000. TV Station - Raise population to 350,000. University - Raise education level to 90. Wind Power Plant - Reach year 1985.