ISS Altitude [km] The International Space Station (ISS) does not orbit the Earth at a perfectly constant altitude. In- stead, the ISS changes its altitude over time due to collisions with atmospheric particles (down- wards) and boosters that are used to adjust the orbit (upwards). The diagram below displays the ISS's altitude above the ground for the last months (December 2023 to April 2024).' 420 419 418 417- 416- 415 ww December 2023 January 2024 February 2024 March 2024 April 2024 (a) How much did the ISS descend and ascend between December 2023 and April 2024? (b) Determine the average rate of descent of the ISS. Space is often considered to start at an altitude of 100 km above ground (the edge of space). (c) How long would it take for the ISS to naturally descend to the edge of space?​